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Finding the Fourth Proportional to 25,885.80, 38,828.70 and 25,540.20

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Solution

The fourth proportional to 25,885.80, 38,828.70 and 25,540.20 is: 38,310.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,885.80 : 38,828.70 = 25,540.20 : x
  2. Step 2: Convert to fraction form
    25,885.80/38,828.70 = 25,540.20/x
  3. Step 3: Cross multiply
    25,885.80x = 38,828.70 × 25,540.20
  4. Step 4: Simplify right side
    25,885.80x = 991,692,763.74
  5. Step 5: Solve for x
    x = 991,692,763.74/25,885.80
  6. Step 6: Final answer
    x = 38,310.30

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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.