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Finding the Fourth Proportional to 25,720.80, 38,581.20 and 9,080.70

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Solution

The fourth proportional to 25,720.80, 38,581.20 and 9,080.70 is: 13,621.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,720.80 : 38,581.20 = 9,080.70 : x
  2. Step 2: Convert to fraction form
    25,720.80/38,581.20 = 9,080.70/x
  3. Step 3: Cross multiply
    25,720.80x = 38,581.20 × 9,080.70
  4. Step 4: Simplify right side
    25,720.80x = 350,344,302.84
  5. Step 5: Solve for x
    x = 350,344,302.84/25,720.80
  6. Step 6: Final answer
    x = 13,621.05

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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.