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Finding the Fourth Proportional to 25,708.80, 38,538.90 and 15,186.90

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Solution

The fourth proportional to 25,708.80, 38,538.90 and 15,186.90 is: 22,766.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,708.80 : 38,538.90 = 15,186.90 : x
  2. Step 2: Convert to fraction form
    25,708.80/38,538.90 = 15,186.90/x
  3. Step 3: Cross multiply
    25,708.80x = 38,538.90 × 15,186.90
  4. Step 4: Simplify right side
    25,708.80x = 585,286,420.41
  5. Step 5: Solve for x
    x = 585,286,420.41/25,708.80
  6. Step 6: Final answer
    x = 22,766.00

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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.