Home / 8,085,681.70-12,128,522.55-7,424,332.90

Finding the Fourth Proportional to 8,085,681.70, 12,128,522.55 and 7,424,332.90

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Solution

The fourth proportional to 8,085,681.70, 12,128,522.55 and 7,424,332.90 is: 11,136,499.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,085,681.70 : 12,128,522.55 = 7,424,332.90 : x
  2. Step 2: Convert to fraction form
    8,085,681.70/12,128,522.55 = 7,424,332.90/x
  3. Step 3: Cross multiply
    8,085,681.70x = 12,128,522.55 × 7,424,332.90
  4. Step 4: Simplify right side
    8,085,681.70x = 90,046,188,996,356.91
  5. Step 5: Solve for x
    x = 90,046,188,996,356.91/8,085,681.70
  6. Step 6: Final answer
    x = 11,136,499.35

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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.