Home / 21,410.32-29,545.48-11,978.88

Finding the Fourth Proportional to 21,410.32, 29,545.48 and 11,978.88

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Solution

The fourth proportional to 21,410.32, 29,545.48 and 11,978.88 is: 16,530.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,410.32 : 29,545.48 = 11,978.88 : x
  2. Step 2: Convert to fraction form
    21,410.32/29,545.48 = 11,978.88/x
  3. Step 3: Cross multiply
    21,410.32x = 29,545.48 × 11,978.88
  4. Step 4: Simplify right side
    21,410.32x = 353,921,759.46
  5. Step 5: Solve for x
    x = 353,921,759.46/21,410.32
  6. Step 6: Final answer
    x = 16,530.43

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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.