Home / 20,373.78-28,115.54-11,421.26

Finding the Fourth Proportional to 20,373.78, 28,115.54 and 11,421.26

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Solution

The fourth proportional to 20,373.78, 28,115.54 and 11,421.26 is: 15,761.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,373.78 : 28,115.54 = 11,421.26 : x
  2. Step 2: Convert to fraction form
    20,373.78/28,115.54 = 11,421.26/x
  3. Step 3: Cross multiply
    20,373.78x = 28,115.54 × 11,421.26
  4. Step 4: Simplify right side
    20,373.78x = 321,114,892.38
  5. Step 5: Solve for x
    x = 321,114,892.38/20,373.78
  6. Step 6: Final answer
    x = 15,761.18

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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.