Home / 20,775.32-31,127.54-11,423.18

Finding the Fourth Proportional to 20,775.32, 31,127.54 and 11,423.18

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Solution

The fourth proportional to 20,775.32, 31,127.54 and 11,423.18 is: 17,115.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.32 : 31,127.54 = 11,423.18 : x
  2. Step 2: Convert to fraction form
    20,775.32/31,127.54 = 11,423.18/x
  3. Step 3: Cross multiply
    20,775.32x = 31,127.54 × 11,423.18
  4. Step 4: Simplify right side
    20,775.32x = 355,575,279.62
  5. Step 5: Solve for x
    x = 355,575,279.62/20,775.32
  6. Step 6: Final answer
    x = 17,115.27

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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.