Home / 21,154.18-31,700.07-11,781.29

Finding the Fourth Proportional to 21,154.18, 31,700.07 and 11,781.29

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Solution

The fourth proportional to 21,154.18, 31,700.07 and 11,781.29 is: 17,654.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,154.18 : 31,700.07 = 11,781.29 : x
  2. Step 2: Convert to fraction form
    21,154.18/31,700.07 = 11,781.29/x
  3. Step 3: Cross multiply
    21,154.18x = 31,700.07 × 11,781.29
  4. Step 4: Simplify right side
    21,154.18x = 373,467,590.62
  5. Step 5: Solve for x
    x = 373,467,590.62/21,154.18
  6. Step 6: Final answer
    x = 17,654.56

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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.