Home / 28,315.74-42,437.28-11,687.46

Finding the Fourth Proportional to 28,315.74, 42,437.28 and 11,687.46

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Solution

The fourth proportional to 28,315.74, 42,437.28 and 11,687.46 is: 17,516.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,315.74 : 42,437.28 = 11,687.46 : x
  2. Step 2: Convert to fraction form
    28,315.74/42,437.28 = 11,687.46/x
  3. Step 3: Cross multiply
    28,315.74x = 42,437.28 × 11,687.46
  4. Step 4: Simplify right side
    28,315.74x = 495,983,897.20
  5. Step 5: Solve for x
    x = 495,983,897.20/28,315.74
  6. Step 6: Final answer
    x = 17,516.19

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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.