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Finding the Fourth Proportional to 18,868.16, 28,292.48 and 8,471.04

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Solution

The fourth proportional to 18,868.16, 28,292.48 and 8,471.04 is: 12,702.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.16 : 28,292.48 = 8,471.04 : x
  2. Step 2: Convert to fraction form
    18,868.16/28,292.48 = 8,471.04/x
  3. Step 3: Cross multiply
    18,868.16x = 28,292.48 × 8,471.04
  4. Step 4: Simplify right side
    18,868.16x = 239,666,729.78
  5. Step 5: Solve for x
    x = 239,666,729.78/18,868.16
  6. Step 6: Final answer
    x = 12,702.18

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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.