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Finding the Fourth Proportional to 7,878.84, 10,872.12 and 4,341.92

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Solution

The fourth proportional to 7,878.84, 10,872.12 and 4,341.92 is: 5,991.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.84 : 10,872.12 = 4,341.92 : x
  2. Step 2: Convert to fraction form
    7,878.84/10,872.12 = 4,341.92/x
  3. Step 3: Cross multiply
    7,878.84x = 10,872.12 × 4,341.92
  4. Step 4: Simplify right side
    7,878.84x = 47,205,875.27
  5. Step 5: Solve for x
    x = 47,205,875.27/7,878.84
  6. Step 6: Final answer
    x = 5,991.48

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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.