Home / 20,136.60-30,204.90-6,990.30

Finding the Fourth Proportional to 20,136.60, 30,204.90 and 6,990.30

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Solution

The fourth proportional to 20,136.60, 30,204.90 and 6,990.30 is: 10,485.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,136.60 : 30,204.90 = 6,990.30 : x
  2. Step 2: Convert to fraction form
    20,136.60/30,204.90 = 6,990.30/x
  3. Step 3: Cross multiply
    20,136.60x = 30,204.90 × 6,990.30
  4. Step 4: Simplify right side
    20,136.60x = 211,141,312.47
  5. Step 5: Solve for x
    x = 211,141,312.47/20,136.60
  6. Step 6: Final answer
    x = 10,485.45

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Half scale
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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.