Home / 21,157.43-29,189.04-13,602.71

Finding the Fourth Proportional to 21,157.43, 29,189.04 and 13,602.71

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Solution

The fourth proportional to 21,157.43, 29,189.04 and 13,602.71 is: 18,766.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.43 : 29,189.04 = 13,602.71 : x
  2. Step 2: Convert to fraction form
    21,157.43/29,189.04 = 13,602.71/x
  3. Step 3: Cross multiply
    21,157.43x = 29,189.04 × 13,602.71
  4. Step 4: Simplify right side
    21,157.43x = 397,050,046.30
  5. Step 5: Solve for x
    x = 397,050,046.30/21,157.43
  6. Step 6: Final answer
    x = 18,766.46

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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.