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Finding the Fourth Proportional to 21,900.80, 32,851.20 and 15,334.40

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Solution

The fourth proportional to 21,900.80, 32,851.20 and 15,334.40 is: 23,001.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,900.80 : 32,851.20 = 15,334.40 : x
  2. Step 2: Convert to fraction form
    21,900.80/32,851.20 = 15,334.40/x
  3. Step 3: Cross multiply
    21,900.80x = 32,851.20 × 15,334.40
  4. Step 4: Simplify right side
    21,900.80x = 503,753,441.28
  5. Step 5: Solve for x
    x = 503,753,441.28/21,900.80
  6. Step 6: Final answer
    x = 23,001.60

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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.