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Finding the Fourth Proportional to 7,961.04, 10,978.74 and 5,125.68

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Solution

The fourth proportional to 7,961.04, 10,978.74 and 5,125.68 is: 7,068.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.04 : 10,978.74 = 5,125.68 : x
  2. Step 2: Convert to fraction form
    7,961.04/10,978.74 = 5,125.68/x
  3. Step 3: Cross multiply
    7,961.04x = 10,978.74 × 5,125.68
  4. Step 4: Simplify right side
    7,961.04x = 56,273,508.04
  5. Step 5: Solve for x
    x = 56,273,508.04/7,961.04
  6. Step 6: Final answer
    x = 7,068.61

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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.