Home / 21,471.29-29,630.67-12,972.23

Finding the Fourth Proportional to 21,471.29, 29,630.67 and 12,972.23

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Solution

The fourth proportional to 21,471.29, 29,630.67 and 12,972.23 is: 17,901.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,471.29 : 29,630.67 = 12,972.23 : x
  2. Step 2: Convert to fraction form
    21,471.29/29,630.67 = 12,972.23/x
  3. Step 3: Cross multiply
    21,471.29x = 29,630.67 × 12,972.23
  4. Step 4: Simplify right side
    21,471.29x = 384,375,718.14
  5. Step 5: Solve for x
    x = 384,375,718.14/21,471.29
  6. Step 6: Final answer
    x = 17,901.85

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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.