Home / 21,872.70-30,168.35-14,306.90

Finding the Fourth Proportional to 21,872.70, 30,168.35 and 14,306.90

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Solution

The fourth proportional to 21,872.70, 30,168.35 and 14,306.90 is: 19,733.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,872.70 : 30,168.35 = 14,306.90 : x
  2. Step 2: Convert to fraction form
    21,872.70/30,168.35 = 14,306.90/x
  3. Step 3: Cross multiply
    21,872.70x = 30,168.35 × 14,306.90
  4. Step 4: Simplify right side
    21,872.70x = 431,615,397.89
  5. Step 5: Solve for x
    x = 431,615,397.89/21,872.70
  6. Step 6: Final answer
    x = 19,733.06

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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.