Home / 21,179.60-29,210.24-15,886.16

Finding the Fourth Proportional to 21,179.60, 29,210.24 and 15,886.16

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Solution

The fourth proportional to 21,179.60, 29,210.24 and 15,886.16 is: 21,909.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.60 : 29,210.24 = 15,886.16 : x
  2. Step 2: Convert to fraction form
    21,179.60/29,210.24 = 15,886.16/x
  3. Step 3: Cross multiply
    21,179.60x = 29,210.24 × 15,886.16
  4. Step 4: Simplify right side
    21,179.60x = 464,038,546.28
  5. Step 5: Solve for x
    x = 464,038,546.28/21,179.60
  6. Step 6: Final answer
    x = 21,909.69

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Similar ratio
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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.