Home / 13,999.20-19,318.68-7,711.80

Finding the Fourth Proportional to 13,999.20, 19,318.68 and 7,711.80

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Solution

The fourth proportional to 13,999.20, 19,318.68 and 7,711.80 is: 10,642.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.20 : 19,318.68 = 7,711.80 : x
  2. Step 2: Convert to fraction form
    13,999.20/19,318.68 = 7,711.80/x
  3. Step 3: Cross multiply
    13,999.20x = 19,318.68 × 7,711.80
  4. Step 4: Simplify right side
    13,999.20x = 148,981,796.42
  5. Step 5: Solve for x
    x = 148,981,796.42/13,999.20
  6. Step 6: Final answer
    x = 10,642.17

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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.