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Finding the Fourth Proportional to 28,375, 39,157.56 and 15,802.24

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Solution

The fourth proportional to 28,375, 39,157.56 and 15,802.24 is: 21,807.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375 : 39,157.56 = 15,802.24 : x
  2. Step 2: Convert to fraction form
    28,375/39,157.56 = 15,802.24/x
  3. Step 3: Cross multiply
    28,375x = 39,157.56 × 15,802.24
  4. Step 4: Simplify right side
    28,375x = 618,777,160.93
  5. Step 5: Solve for x
    x = 618,777,160.93/28,375
  6. Step 6: Final answer
    x = 21,807.12

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1.5x scale

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.