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Finding the Fourth Proportional to 21,908.10, 32,862.15 and 8,055.30

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Solution

The fourth proportional to 21,908.10, 32,862.15 and 8,055.30 is: 12,082.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908.10 : 32,862.15 = 8,055.30 : x
  2. Step 2: Convert to fraction form
    21,908.10/32,862.15 = 8,055.30/x
  3. Step 3: Cross multiply
    21,908.10x = 32,862.15 × 8,055.30
  4. Step 4: Simplify right side
    21,908.10x = 264,714,476.90
  5. Step 5: Solve for x
    x = 264,714,476.90/21,908.10
  6. Step 6: Final answer
    x = 12,082.95

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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.