Home / 8,972.81-13,459.28-3,129.42

Finding the Fourth Proportional to 8,972.81, 13,459.28 and 3,129.42

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Solution

The fourth proportional to 8,972.81, 13,459.28 and 3,129.42 is: 4,694.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,972.81 : 13,459.28 = 3,129.42 : x
  2. Step 2: Convert to fraction form
    8,972.81/13,459.28 = 3,129.42/x
  3. Step 3: Cross multiply
    8,972.81x = 13,459.28 × 3,129.42
  4. Step 4: Simplify right side
    8,972.81x = 42,119,740.02
  5. Step 5: Solve for x
    x = 42,119,740.02/8,972.81
  6. Step 6: Final answer
    x = 4,694.15

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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.