Home / 21,276.60-31,867.36-15,419.76

Finding the Fourth Proportional to 21,276.60, 31,867.36 and 15,419.76

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Solution

The fourth proportional to 21,276.60, 31,867.36 and 15,419.76 is: 23,095.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.60 : 31,867.36 = 15,419.76 : x
  2. Step 2: Convert to fraction form
    21,276.60/31,867.36 = 15,419.76/x
  3. Step 3: Cross multiply
    21,276.60x = 31,867.36 × 15,419.76
  4. Step 4: Simplify right side
    21,276.60x = 491,387,043.03
  5. Step 5: Solve for x
    x = 491,387,043.03/21,276.60
  6. Step 6: Final answer
    x = 23,095.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.