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Finding the Fourth Proportional to 18,389.58, 27,531.18 and 16,490.40

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Solution

The fourth proportional to 18,389.58, 27,531.18 and 16,490.40 is: 24,687.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,389.58 : 27,531.18 = 16,490.40 : x
  2. Step 2: Convert to fraction form
    18,389.58/27,531.18 = 16,490.40/x
  3. Step 3: Cross multiply
    18,389.58x = 27,531.18 × 16,490.40
  4. Step 4: Simplify right side
    18,389.58x = 454,000,170.67
  5. Step 5: Solve for x
    x = 454,000,170.67/18,389.58
  6. Step 6: Final answer
    x = 24,687.90

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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.