Home / 31,382.16-47,036.12-13,815.28

Finding the Fourth Proportional to 31,382.16, 47,036.12 and 13,815.28

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Solution

The fourth proportional to 31,382.16, 47,036.12 and 13,815.28 is: 20,706.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,382.16 : 47,036.12 = 13,815.28 : x
  2. Step 2: Convert to fraction form
    31,382.16/47,036.12 = 13,815.28/x
  3. Step 3: Cross multiply
    31,382.16x = 47,036.12 × 13,815.28
  4. Step 4: Simplify right side
    31,382.16x = 649,817,167.91
  5. Step 5: Solve for x
    x = 649,817,167.91/31,382.16
  6. Step 6: Final answer
    x = 20,706.58

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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.