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Finding the Fourth Proportional to 18,641.59, 25,695.87 and 13,787.83

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Solution

The fourth proportional to 18,641.59, 25,695.87 and 13,787.83 is: 19,005.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,641.59 : 25,695.87 = 13,787.83 : x
  2. Step 2: Convert to fraction form
    18,641.59/25,695.87 = 13,787.83/x
  3. Step 3: Cross multiply
    18,641.59x = 25,695.87 × 13,787.83
  4. Step 4: Simplify right side
    18,641.59x = 354,290,267.68
  5. Step 5: Solve for x
    x = 354,290,267.68/18,641.59
  6. Step 6: Final answer
    x = 19,005.37

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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.