Home / 21,643.60-29,867.28-13,146.64

Finding the Fourth Proportional to 21,643.60, 29,867.28 and 13,146.64

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Solution

The fourth proportional to 21,643.60, 29,867.28 and 13,146.64 is: 18,141.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,643.60 : 29,867.28 = 13,146.64 : x
  2. Step 2: Convert to fraction form
    21,643.60/29,867.28 = 13,146.64/x
  3. Step 3: Cross multiply
    21,643.60x = 29,867.28 × 13,146.64
  4. Step 4: Simplify right side
    21,643.60x = 392,654,377.94
  5. Step 5: Solve for x
    x = 392,654,377.94/21,643.60
  6. Step 6: Final answer
    x = 18,141.82

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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.