Home / 21,155.60-29,204.20-15,216.40

Finding the Fourth Proportional to 21,155.60, 29,204.20 and 15,216.40

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Solution

The fourth proportional to 21,155.60, 29,204.20 and 15,216.40 is: 21,005.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.60 : 29,204.20 = 15,216.40 : x
  2. Step 2: Convert to fraction form
    21,155.60/29,204.20 = 15,216.40/x
  3. Step 3: Cross multiply
    21,155.60x = 29,204.20 × 15,216.40
  4. Step 4: Simplify right side
    21,155.60x = 444,382,788.88
  5. Step 5: Solve for x
    x = 444,382,788.88/21,155.60
  6. Step 6: Final answer
    x = 21,005.44

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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.