Home / 9,121.20-13,681.80-5,792.10

Finding the Fourth Proportional to 9,121.20, 13,681.80 and 5,792.10

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Solution

The fourth proportional to 9,121.20, 13,681.80 and 5,792.10 is: 8,688.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.20 : 13,681.80 = 5,792.10 : x
  2. Step 2: Convert to fraction form
    9,121.20/13,681.80 = 5,792.10/x
  3. Step 3: Cross multiply
    9,121.20x = 13,681.80 × 5,792.10
  4. Step 4: Simplify right side
    9,121.20x = 79,246,353.78
  5. Step 5: Solve for x
    x = 79,246,353.78/9,121.20
  6. Step 6: Final answer
    x = 8,688.15

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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.