Home / 8,085,513.20-12,128,269.80-7,424,164.40

Finding the Fourth Proportional to 8,085,513.20, 12,128,269.80 and 7,424,164.40

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Solution

The fourth proportional to 8,085,513.20, 12,128,269.80 and 7,424,164.40 is: 11,136,246.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,085,513.20 : 12,128,269.80 = 7,424,164.40 : x
  2. Step 2: Convert to fraction form
    8,085,513.20/12,128,269.80 = 7,424,164.40/x
  3. Step 3: Cross multiply
    8,085,513.20x = 12,128,269.80 × 7,424,164.40
  4. Step 4: Simplify right side
    8,085,513.20x = 90,042,268,882,755.12
  5. Step 5: Solve for x
    x = 90,042,268,882,755.12/8,085,513.20
  6. Step 6: Final answer
    x = 11,136,246.60

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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.