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Finding the Fourth Proportional to 18,744.72, 28,118.72 and 7,652.17

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Solution

The fourth proportional to 18,744.72, 28,118.72 and 7,652.17 is: 11,478.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,744.72 : 28,118.72 = 7,652.17 : x
  2. Step 2: Convert to fraction form
    18,744.72/28,118.72 = 7,652.17/x
  3. Step 3: Cross multiply
    18,744.72x = 28,118.72 × 7,652.17
  4. Step 4: Simplify right side
    18,744.72x = 215,169,225.62
  5. Step 5: Solve for x
    x = 215,169,225.62/18,744.72
  6. Step 6: Final answer
    x = 11,478.92

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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.