Home / 9,085.20-12,531.90-5,725.20

Finding the Fourth Proportional to 9,085.20, 12,531.90 and 5,725.20

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Solution

The fourth proportional to 9,085.20, 12,531.90 and 5,725.20 is: 7,897.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,085.20 : 12,531.90 = 5,725.20 : x
  2. Step 2: Convert to fraction form
    9,085.20/12,531.90 = 5,725.20/x
  3. Step 3: Cross multiply
    9,085.20x = 12,531.90 × 5,725.20
  4. Step 4: Simplify right side
    9,085.20x = 71,747,633.88
  5. Step 5: Solve for x
    x = 71,747,633.88/9,085.20
  6. Step 6: Final answer
    x = 7,897.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.