Home / 8,916.11-12,305.76-5,138.60

Finding the Fourth Proportional to 8,916.11, 12,305.76 and 5,138.60

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Solution

The fourth proportional to 8,916.11, 12,305.76 and 5,138.60 is: 7,092.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916.11 : 12,305.76 = 5,138.60 : x
  2. Step 2: Convert to fraction form
    8,916.11/12,305.76 = 5,138.60/x
  3. Step 3: Cross multiply
    8,916.11x = 12,305.76 × 5,138.60
  4. Step 4: Simplify right side
    8,916.11x = 63,234,378.34
  5. Step 5: Solve for x
    x = 63,234,378.34/8,916.11
  6. Step 6: Final answer
    x = 7,092.15

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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.