Home / 21,658.89-29,873.28-13,693.43

Finding the Fourth Proportional to 21,658.89, 29,873.28 and 13,693.43

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Solution

The fourth proportional to 21,658.89, 29,873.28 and 13,693.43 is: 18,886.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,658.89 : 29,873.28 = 13,693.43 : x
  2. Step 2: Convert to fraction form
    21,658.89/29,873.28 = 13,693.43/x
  3. Step 3: Cross multiply
    21,658.89x = 29,873.28 × 13,693.43
  4. Step 4: Simplify right side
    21,658.89x = 409,067,672.05
  5. Step 5: Solve for x
    x = 409,067,672.05/21,658.89
  6. Step 6: Final answer
    x = 18,886.82

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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.