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Finding the Fourth Proportional to 5,118.80, 7,070.47 and 3,916.47

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Solution

The fourth proportional to 5,118.80, 7,070.47 and 3,916.47 is: 5,409.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.80 : 7,070.47 = 3,916.47 : x
  2. Step 2: Convert to fraction form
    5,118.80/7,070.47 = 3,916.47/x
  3. Step 3: Cross multiply
    5,118.80x = 7,070.47 × 3,916.47
  4. Step 4: Simplify right side
    5,118.80x = 27,691,279.30
  5. Step 5: Solve for x
    x = 27,691,279.30/5,118.80
  6. Step 6: Final answer
    x = 5,409.72

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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.