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Finding the Fourth Proportional to 8,756.11, 12,082.94 and 4,978.74

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Solution

The fourth proportional to 8,756.11, 12,082.94 and 4,978.74 is: 6,870.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,756.11 : 12,082.94 = 4,978.74 : x
  2. Step 2: Convert to fraction form
    8,756.11/12,082.94 = 4,978.74/x
  3. Step 3: Cross multiply
    8,756.11x = 12,082.94 × 4,978.74
  4. Step 4: Simplify right side
    8,756.11x = 60,157,731.39
  5. Step 5: Solve for x
    x = 60,157,731.39/8,756.11
  6. Step 6: Final answer
    x = 6,870.38

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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.