Home / 21,023.30-29,014.18-15,708.89

Finding the Fourth Proportional to 21,023.30, 29,014.18 and 15,708.89

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Solution

The fourth proportional to 21,023.30, 29,014.18 and 15,708.89 is: 21,679.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,023.30 : 29,014.18 = 15,708.89 : x
  2. Step 2: Convert to fraction form
    21,023.30/29,014.18 = 15,708.89/x
  3. Step 3: Cross multiply
    21,023.30x = 29,014.18 × 15,708.89
  4. Step 4: Simplify right side
    21,023.30x = 455,780,562.06
  5. Step 5: Solve for x
    x = 455,780,562.06/21,023.30
  6. Step 6: Final answer
    x = 21,679.78

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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.