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Finding the Fourth Proportional to 18,489.67, 25,527.49 and 11,420.19

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Solution

The fourth proportional to 18,489.67, 25,527.49 and 11,420.19 is: 15,767.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.67 : 25,527.49 = 11,420.19 : x
  2. Step 2: Convert to fraction form
    18,489.67/25,527.49 = 11,420.19/x
  3. Step 3: Cross multiply
    18,489.67x = 25,527.49 × 11,420.19
  4. Step 4: Simplify right side
    18,489.67x = 291,528,757.47
  5. Step 5: Solve for x
    x = 291,528,757.47/18,489.67
  6. Step 6: Final answer
    x = 15,767.12

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Half scale
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Double scale
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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.