Home / 12,453,136.80-18,679,705.20-6,784,432.80

Finding the Fourth Proportional to 12,453,136.80, 18,679,705.20 and 6,784,432.80

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Solution

The fourth proportional to 12,453,136.80, 18,679,705.20 and 6,784,432.80 is: 10,176,649.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,453,136.80 : 18,679,705.20 = 6,784,432.80 : x
  2. Step 2: Convert to fraction form
    12,453,136.80/18,679,705.20 = 6,784,432.80/x
  3. Step 3: Cross multiply
    12,453,136.80x = 18,679,705.20 × 6,784,432.80
  4. Step 4: Simplify right side
    12,453,136.80x = 126,731,204,653,210.55
  5. Step 5: Solve for x
    x = 126,731,204,653,210.55/12,453,136.80
  6. Step 6: Final answer
    x = 10,176,649.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.