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Finding the Fourth Proportional to 18,535.69, 27,807.90 and 5,387.68

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Solution

The fourth proportional to 18,535.69, 27,807.90 and 5,387.68 is: 8,082.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,535.69 : 27,807.90 = 5,387.68 : x
  2. Step 2: Convert to fraction form
    18,535.69/27,807.90 = 5,387.68/x
  3. Step 3: Cross multiply
    18,535.69x = 27,807.90 × 5,387.68
  4. Step 4: Simplify right side
    18,535.69x = 149,820,066.67
  5. Step 5: Solve for x
    x = 149,820,066.67/18,535.69
  6. Step 6: Final answer
    x = 8,082.79

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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.