Home / 21,471.08-29,630.10-13,087.58

Finding the Fourth Proportional to 21,471.08, 29,630.10 and 13,087.58

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Solution

The fourth proportional to 21,471.08, 29,630.10 and 13,087.58 is: 18,060.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,471.08 : 29,630.10 = 13,087.58 : x
  2. Step 2: Convert to fraction form
    21,471.08/29,630.10 = 13,087.58/x
  3. Step 3: Cross multiply
    21,471.08x = 29,630.10 × 13,087.58
  4. Step 4: Simplify right side
    21,471.08x = 387,786,267.12
  5. Step 5: Solve for x
    x = 387,786,267.12/21,471.08
  6. Step 6: Final answer
    x = 18,060.87

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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.