Home / 21,330.22-29,445.14-13,780.24

Finding the Fourth Proportional to 21,330.22, 29,445.14 and 13,780.24

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Solution

The fourth proportional to 21,330.22, 29,445.14 and 13,780.24 is: 19,022.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.22 : 29,445.14 = 13,780.24 : x
  2. Step 2: Convert to fraction form
    21,330.22/29,445.14 = 13,780.24/x
  3. Step 3: Cross multiply
    21,330.22x = 29,445.14 × 13,780.24
  4. Step 4: Simplify right side
    21,330.22x = 405,761,096.03
  5. Step 5: Solve for x
    x = 405,761,096.03/21,330.22
  6. Step 6: Final answer
    x = 19,022.83

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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.