Home / 31,780.44-47,639.64-15,135.96

Finding the Fourth Proportional to 31,780.44, 47,639.64 and 15,135.96

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Solution

The fourth proportional to 31,780.44, 47,639.64 and 15,135.96 is: 22,689.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,780.44 : 47,639.64 = 15,135.96 : x
  2. Step 2: Convert to fraction form
    31,780.44/47,639.64 = 15,135.96/x
  3. Step 3: Cross multiply
    31,780.44x = 47,639.64 × 15,135.96
  4. Step 4: Simplify right side
    31,780.44x = 721,071,685.45
  5. Step 5: Solve for x
    x = 721,071,685.45/31,780.44
  6. Step 6: Final answer
    x = 22,689.17

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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.