Home / 21,882.80-30,167.16-15,575.60

Finding the Fourth Proportional to 21,882.80, 30,167.16 and 15,575.60

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Solution

The fourth proportional to 21,882.80, 30,167.16 and 15,575.60 is: 21,472.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,882.80 : 30,167.16 = 15,575.60 : x
  2. Step 2: Convert to fraction form
    21,882.80/30,167.16 = 15,575.60/x
  3. Step 3: Cross multiply
    21,882.80x = 30,167.16 × 15,575.60
  4. Step 4: Simplify right side
    21,882.80x = 469,871,617.30
  5. Step 5: Solve for x
    x = 469,871,617.30/21,882.80
  6. Step 6: Final answer
    x = 21,472.19

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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.