Home / 8,921.16-12,313.92-5,146.80

Finding the Fourth Proportional to 8,921.16, 12,313.92 and 5,146.80

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Solution

The fourth proportional to 8,921.16, 12,313.92 and 5,146.80 is: 7,104.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.16 : 12,313.92 = 5,146.80 : x
  2. Step 2: Convert to fraction form
    8,921.16/12,313.92 = 5,146.80/x
  3. Step 3: Cross multiply
    8,921.16x = 12,313.92 × 5,146.80
  4. Step 4: Simplify right side
    8,921.16x = 63,377,283.46
  5. Step 5: Solve for x
    x = 63,377,283.46/8,921.16
  6. Step 6: Final answer
    x = 7,104.15

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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.