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Finding the Fourth Proportional to 18,773.80, 25,876.74 and 13,460.20

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Solution

The fourth proportional to 18,773.80, 25,876.74 and 13,460.20 is: 18,552.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,773.80 : 25,876.74 = 13,460.20 : x
  2. Step 2: Convert to fraction form
    18,773.80/25,876.74 = 13,460.20/x
  3. Step 3: Cross multiply
    18,773.80x = 25,876.74 × 13,460.20
  4. Step 4: Simplify right side
    18,773.80x = 348,306,095.75
  5. Step 5: Solve for x
    x = 348,306,095.75/18,773.80
  6. Step 6: Final answer
    x = 18,552.78

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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.