Home / 20,400.14-28,152.42-11,326.12

Finding the Fourth Proportional to 20,400.14, 28,152.42 and 11,326.12

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Solution

The fourth proportional to 20,400.14, 28,152.42 and 11,326.12 is: 15,630.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.14 : 28,152.42 = 11,326.12 : x
  2. Step 2: Convert to fraction form
    20,400.14/28,152.42 = 11,326.12/x
  3. Step 3: Cross multiply
    20,400.14x = 28,152.42 × 11,326.12
  4. Step 4: Simplify right side
    20,400.14x = 318,857,687.21
  5. Step 5: Solve for x
    x = 318,857,687.21/20,400.14
  6. Step 6: Final answer
    x = 15,630.17

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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.