Home / 21,451.14-32,159.43-9,147.78

Finding the Fourth Proportional to 21,451.14, 32,159.43 and 9,147.78

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Solution

The fourth proportional to 21,451.14, 32,159.43 and 9,147.78 is: 13,714.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,451.14 : 32,159.43 = 9,147.78 : x
  2. Step 2: Convert to fraction form
    21,451.14/32,159.43 = 9,147.78/x
  3. Step 3: Cross multiply
    21,451.14x = 32,159.43 × 9,147.78
  4. Step 4: Simplify right side
    21,451.14x = 294,187,390.57
  5. Step 5: Solve for x
    x = 294,187,390.57/21,451.14
  6. Step 6: Final answer
    x = 13,714.30

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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.