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Finding the Fourth Proportional to 18,677.48, 27,987 and 15,892.70

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Solution

The fourth proportional to 18,677.48, 27,987 and 15,892.70 is: 23,814.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,677.48 : 27,987 = 15,892.70 : x
  2. Step 2: Convert to fraction form
    18,677.48/27,987 = 15,892.70/x
  3. Step 3: Cross multiply
    18,677.48x = 27,987 × 15,892.70
  4. Step 4: Simplify right side
    18,677.48x = 444,788,994.90
  5. Step 5: Solve for x
    x = 444,788,994.90/18,677.48
  6. Step 6: Final answer
    x = 23,814.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.