Home / 9,110.78-12,572.62-5,131.80

Finding the Fourth Proportional to 9,110.78, 12,572.62 and 5,131.80

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Solution

The fourth proportional to 9,110.78, 12,572.62 and 5,131.80 is: 7,081.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,110.78 : 12,572.62 = 5,131.80 : x
  2. Step 2: Convert to fraction form
    9,110.78/12,572.62 = 5,131.80/x
  3. Step 3: Cross multiply
    9,110.78x = 12,572.62 × 5,131.80
  4. Step 4: Simplify right side
    9,110.78x = 64,520,158.49
  5. Step 5: Solve for x
    x = 64,520,158.49/9,110.78
  6. Step 6: Final answer
    x = 7,081.74

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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.