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Finding the Fourth Proportional to 28,374, 39,156.18 and 15,801.24

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Solution

The fourth proportional to 28,374, 39,156.18 and 15,801.24 is: 21,805.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,374 : 39,156.18 = 15,801.24 : x
  2. Step 2: Convert to fraction form
    28,374/39,156.18 = 15,801.24/x
  3. Step 3: Cross multiply
    28,374x = 39,156.18 × 15,801.24
  4. Step 4: Simplify right side
    28,374x = 618,716,197.66
  5. Step 5: Solve for x
    x = 618,716,197.66/28,374
  6. Step 6: Final answer
    x = 21,805.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.