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Finding the Fourth Proportional to 18,474.60, 27,711.90 and 18,280.20

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Solution

The fourth proportional to 18,474.60, 27,711.90 and 18,280.20 is: 27,420.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,474.60 : 27,711.90 = 18,280.20 : x
  2. Step 2: Convert to fraction form
    18,474.60/27,711.90 = 18,280.20/x
  3. Step 3: Cross multiply
    18,474.60x = 27,711.90 × 18,280.20
  4. Step 4: Simplify right side
    18,474.60x = 506,579,074.38
  5. Step 5: Solve for x
    x = 506,579,074.38/18,474.60
  6. Step 6: Final answer
    x = 27,420.30

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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.