Home / 21,418.61-29,553.57-13,863.89

Finding the Fourth Proportional to 21,418.61, 29,553.57 and 13,863.89

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Solution

The fourth proportional to 21,418.61, 29,553.57 and 13,863.89 is: 19,129.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.61 : 29,553.57 = 13,863.89 : x
  2. Step 2: Convert to fraction form
    21,418.61/29,553.57 = 13,863.89/x
  3. Step 3: Cross multiply
    21,418.61x = 29,553.57 × 13,863.89
  4. Step 4: Simplify right side
    21,418.61x = 409,727,295.82
  5. Step 5: Solve for x
    x = 409,727,295.82/21,418.61
  6. Step 6: Final answer
    x = 19,129.50

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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.