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Finding the Fourth Proportional to 21,851.20, 32,863.20 and 19,604.80

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Solution

The fourth proportional to 21,851.20, 32,863.20 and 19,604.80 is: 29,484.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,851.20 : 32,863.20 = 19,604.80 : x
  2. Step 2: Convert to fraction form
    21,851.20/32,863.20 = 19,604.80/x
  3. Step 3: Cross multiply
    21,851.20x = 32,863.20 × 19,604.80
  4. Step 4: Simplify right side
    21,851.20x = 644,276,463.36
  5. Step 5: Solve for x
    x = 644,276,463.36/21,851.20
  6. Step 6: Final answer
    x = 29,484.72

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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.