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Finding the Fourth Proportional to 7,878.40, 10,876.08 and 5,373.52

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Solution

The fourth proportional to 7,878.40, 10,876.08 and 5,373.52 is: 7,418.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.40 : 10,876.08 = 5,373.52 : x
  2. Step 2: Convert to fraction form
    7,878.40/10,876.08 = 5,373.52/x
  3. Step 3: Cross multiply
    7,878.40x = 10,876.08 × 5,373.52
  4. Step 4: Simplify right side
    7,878.40x = 58,442,833.40
  5. Step 5: Solve for x
    x = 58,442,833.40/7,878.40
  6. Step 6: Final answer
    x = 7,418.11

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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.