Home / 9,121.46-12,587.43-5,142.49

Finding the Fourth Proportional to 9,121.46, 12,587.43 and 5,142.49

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Solution

The fourth proportional to 9,121.46, 12,587.43 and 5,142.49 is: 7,096.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.46 : 12,587.43 = 5,142.49 : x
  2. Step 2: Convert to fraction form
    9,121.46/12,587.43 = 5,142.49/x
  3. Step 3: Cross multiply
    9,121.46x = 12,587.43 × 5,142.49
  4. Step 4: Simplify right side
    9,121.46x = 64,730,701.43
  5. Step 5: Solve for x
    x = 64,730,701.43/9,121.46
  6. Step 6: Final answer
    x = 7,096.53

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Double scale
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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.