Home / 21,355.12-29,476.06-12,400.97

Finding the Fourth Proportional to 21,355.12, 29,476.06 and 12,400.97

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Solution

The fourth proportional to 21,355.12, 29,476.06 and 12,400.97 is: 17,116.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,355.12 : 29,476.06 = 12,400.97 : x
  2. Step 2: Convert to fraction form
    21,355.12/29,476.06 = 12,400.97/x
  3. Step 3: Cross multiply
    21,355.12x = 29,476.06 × 12,400.97
  4. Step 4: Simplify right side
    21,355.12x = 365,531,778.47
  5. Step 5: Solve for x
    x = 365,531,778.47/21,355.12
  6. Step 6: Final answer
    x = 17,116.82

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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.