Home / 13,814.38-20,723.10-4,931.78

Finding the Fourth Proportional to 13,814.38, 20,723.10 and 4,931.78

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Solution

The fourth proportional to 13,814.38, 20,723.10 and 4,931.78 is: 7,398.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,814.38 : 20,723.10 = 4,931.78 : x
  2. Step 2: Convert to fraction form
    13,814.38/20,723.10 = 4,931.78/x
  3. Step 3: Cross multiply
    13,814.38x = 20,723.10 × 4,931.78
  4. Step 4: Simplify right side
    13,814.38x = 102,201,641.84
  5. Step 5: Solve for x
    x = 102,201,641.84/13,814.38
  6. Step 6: Final answer
    x = 7,398.21

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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.