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Finding the Fourth Proportional to 7,888.72, 10,876.28 and 6,467.12

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Solution

The fourth proportional to 7,888.72, 10,876.28 and 6,467.12 is: 8,916.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,888.72 : 10,876.28 = 6,467.12 : x
  2. Step 2: Convert to fraction form
    7,888.72/10,876.28 = 6,467.12/x
  3. Step 3: Cross multiply
    7,888.72x = 10,876.28 × 6,467.12
  4. Step 4: Simplify right side
    7,888.72x = 70,338,207.91
  5. Step 5: Solve for x
    x = 70,338,207.91/7,888.72
  6. Step 6: Final answer
    x = 8,916.30

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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.