Home / 9,121.35-12,587.44-5,142.43

Finding the Fourth Proportional to 9,121.35, 12,587.44 and 5,142.43

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Solution

The fourth proportional to 9,121.35, 12,587.44 and 5,142.43 is: 7,096.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.35 : 12,587.44 = 5,142.43 : x
  2. Step 2: Convert to fraction form
    9,121.35/12,587.44 = 5,142.43/x
  3. Step 3: Cross multiply
    9,121.35x = 12,587.44 × 5,142.43
  4. Step 4: Simplify right side
    9,121.35x = 64,730,025.52
  5. Step 5: Solve for x
    x = 64,730,025.52/9,121.35
  6. Step 6: Final answer
    x = 7,096.54

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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.