Home / 21,915.52-32,873.28-18,620.80

Finding the Fourth Proportional to 21,915.52, 32,873.28 and 18,620.80

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Solution

The fourth proportional to 21,915.52, 32,873.28 and 18,620.80 is: 27,931.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,915.52 : 32,873.28 = 18,620.80 : x
  2. Step 2: Convert to fraction form
    21,915.52/32,873.28 = 18,620.80/x
  3. Step 3: Cross multiply
    21,915.52x = 32,873.28 × 18,620.80
  4. Step 4: Simplify right side
    21,915.52x = 612,126,772.22
  5. Step 5: Solve for x
    x = 612,126,772.22/21,915.52
  6. Step 6: Final answer
    x = 27,931.20

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1.5x scale

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.