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Finding the Fourth Proportional to 28,371, 39,151.98 and 15,796.56

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Solution

The fourth proportional to 28,371, 39,151.98 and 15,796.56 is: 21,799.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,371 : 39,151.98 = 15,796.56 : x
  2. Step 2: Convert to fraction form
    28,371/39,151.98 = 15,796.56/x
  3. Step 3: Cross multiply
    28,371x = 39,151.98 × 15,796.56
  4. Step 4: Simplify right side
    28,371x = 618,466,601.19
  5. Step 5: Solve for x
    x = 618,466,601.19/28,371
  6. Step 6: Final answer
    x = 21,799.25

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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.