Home / 21,143.30-29,164.55-13,599.47

Finding the Fourth Proportional to 21,143.30, 29,164.55 and 13,599.47

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Solution

The fourth proportional to 21,143.30, 29,164.55 and 13,599.47 is: 18,758.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.30 : 29,164.55 = 13,599.47 : x
  2. Step 2: Convert to fraction form
    21,143.30/29,164.55 = 13,599.47/x
  3. Step 3: Cross multiply
    21,143.30x = 29,164.55 × 13,599.47
  4. Step 4: Simplify right side
    21,143.30x = 396,622,208.97
  5. Step 5: Solve for x
    x = 396,622,208.97/21,143.30
  6. Step 6: Final answer
    x = 18,758.77

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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.