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Finding the Fourth Proportional to 7,882.78, 10,878.24 and 4,346.32

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Solution

The fourth proportional to 7,882.78, 10,878.24 and 4,346.32 is: 5,997.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,882.78 : 10,878.24 = 4,346.32 : x
  2. Step 2: Convert to fraction form
    7,882.78/10,878.24 = 4,346.32/x
  3. Step 3: Cross multiply
    7,882.78x = 10,878.24 × 4,346.32
  4. Step 4: Simplify right side
    7,882.78x = 47,280,312.08
  5. Step 5: Solve for x
    x = 47,280,312.08/7,882.78
  6. Step 6: Final answer
    x = 5,997.92

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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.