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Finding the Fourth Proportional to 18,712.80, 25,648.20 and 18,583.20

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Solution

The fourth proportional to 18,712.80, 25,648.20 and 18,583.20 is: 25,470.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.80 : 25,648.20 = 18,583.20 : x
  2. Step 2: Convert to fraction form
    18,712.80/25,648.20 = 18,583.20/x
  3. Step 3: Cross multiply
    18,712.80x = 25,648.20 × 18,583.20
  4. Step 4: Simplify right side
    18,712.80x = 476,625,630.24
  5. Step 5: Solve for x
    x = 476,625,630.24/18,712.80
  6. Step 6: Final answer
    x = 25,470.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.