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Finding the Fourth Proportional to 4,876.72, 6,721.32 and 3,885.28

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Solution

The fourth proportional to 4,876.72, 6,721.32 and 3,885.28 is: 5,354.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,876.72 : 6,721.32 = 3,885.28 : x
  2. Step 2: Convert to fraction form
    4,876.72/6,721.32 = 3,885.28/x
  3. Step 3: Cross multiply
    4,876.72x = 6,721.32 × 3,885.28
  4. Step 4: Simplify right side
    4,876.72x = 26,114,210.17
  5. Step 5: Solve for x
    x = 26,114,210.17/4,876.72
  6. Step 6: Final answer
    x = 5,354.87

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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.