Home / 31,318.61-46,972.91-9,126.79

Finding the Fourth Proportional to 31,318.61, 46,972.91 and 9,126.79

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Solution

The fourth proportional to 31,318.61, 46,972.91 and 9,126.79 is: 13,688.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,318.61 : 46,972.91 = 9,126.79 : x
  2. Step 2: Convert to fraction form
    31,318.61/46,972.91 = 9,126.79/x
  3. Step 3: Cross multiply
    31,318.61x = 46,972.91 × 9,126.79
  4. Step 4: Simplify right side
    31,318.61x = 428,711,871.42
  5. Step 5: Solve for x
    x = 428,711,871.42/31,318.61
  6. Step 6: Final answer
    x = 13,688.73

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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.