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Finding the Fourth Proportional to 38,574.80, 57,862.20 and 12,282.20

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Solution

The fourth proportional to 38,574.80, 57,862.20 and 12,282.20 is: 18,423.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,574.80 : 57,862.20 = 12,282.20 : x
  2. Step 2: Convert to fraction form
    38,574.80/57,862.20 = 12,282.20/x
  3. Step 3: Cross multiply
    38,574.80x = 57,862.20 × 12,282.20
  4. Step 4: Simplify right side
    38,574.80x = 710,675,112.84
  5. Step 5: Solve for x
    x = 710,675,112.84/38,574.80
  6. Step 6: Final answer
    x = 18,423.30

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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.