Home / 21,471.41-29,630.85-12,972.35

Finding the Fourth Proportional to 21,471.41, 29,630.85 and 12,972.35

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Solution

The fourth proportional to 21,471.41, 29,630.85 and 12,972.35 is: 17,902.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,471.41 : 29,630.85 = 12,972.35 : x
  2. Step 2: Convert to fraction form
    21,471.41/29,630.85 = 12,972.35/x
  3. Step 3: Cross multiply
    21,471.41x = 29,630.85 × 12,972.35
  4. Step 4: Simplify right side
    21,471.41x = 384,381,543.98
  5. Step 5: Solve for x
    x = 384,381,543.98/21,471.41
  6. Step 6: Final answer
    x = 17,902.02

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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.