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Finding the Fourth Proportional to 25,999.95, 35,864.46 and 15,787.47

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Solution

The fourth proportional to 25,999.95, 35,864.46 and 15,787.47 is: 21,777.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,999.95 : 35,864.46 = 15,787.47 : x
  2. Step 2: Convert to fraction form
    25,999.95/35,864.46 = 15,787.47/x
  3. Step 3: Cross multiply
    25,999.95x = 35,864.46 × 15,787.47
  4. Step 4: Simplify right side
    25,999.95x = 566,209,086.32
  5. Step 5: Solve for x
    x = 566,209,086.32/25,999.95
  6. Step 6: Final answer
    x = 21,777.31

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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.