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Finding the Fourth Proportional to 7,878.33, 10,871.37 and 4,340.70

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Solution

The fourth proportional to 7,878.33, 10,871.37 and 4,340.70 is: 5,989.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.33 : 10,871.37 = 4,340.70 : x
  2. Step 2: Convert to fraction form
    7,878.33/10,871.37 = 4,340.70/x
  3. Step 3: Cross multiply
    7,878.33x = 10,871.37 × 4,340.70
  4. Step 4: Simplify right side
    7,878.33x = 47,189,355.76
  5. Step 5: Solve for x
    x = 47,189,355.76/7,878.33
  6. Step 6: Final answer
    x = 5,989.77

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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.