Home / 21,615.28-29,818.40-18,625.92

Finding the Fourth Proportional to 21,615.28, 29,818.40 and 18,625.92

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Solution

The fourth proportional to 21,615.28, 29,818.40 and 18,625.92 is: 25,694.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,615.28 : 29,818.40 = 18,625.92 : x
  2. Step 2: Convert to fraction form
    21,615.28/29,818.40 = 18,625.92/x
  3. Step 3: Cross multiply
    21,615.28x = 29,818.40 × 18,625.92
  4. Step 4: Simplify right side
    21,615.28x = 555,395,132.93
  5. Step 5: Solve for x
    x = 555,395,132.93/21,615.28
  6. Step 6: Final answer
    x = 25,694.56

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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.