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Finding the Fourth Proportional to 25,888.50, 35,726.13 and 15,278.40

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Solution

The fourth proportional to 25,888.50, 35,726.13 and 15,278.40 is: 21,084.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,888.50 : 35,726.13 = 15,278.40 : x
  2. Step 2: Convert to fraction form
    25,888.50/35,726.13 = 15,278.40/x
  3. Step 3: Cross multiply
    25,888.50x = 35,726.13 × 15,278.40
  4. Step 4: Simplify right side
    25,888.50x = 545,838,104.59
  5. Step 5: Solve for x
    x = 545,838,104.59/25,888.50
  6. Step 6: Final answer
    x = 21,084.19

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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.