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Finding the Fourth Proportional to 7,219.85, 9,957.87 and 4,985.46

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Solution

The fourth proportional to 7,219.85, 9,957.87 and 4,985.46 is: 6,876.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,219.85 : 9,957.87 = 4,985.46 : x
  2. Step 2: Convert to fraction form
    7,219.85/9,957.87 = 4,985.46/x
  3. Step 3: Cross multiply
    7,219.85x = 9,957.87 × 4,985.46
  4. Step 4: Simplify right side
    7,219.85x = 49,644,562.57
  5. Step 5: Solve for x
    x = 49,644,562.57/7,219.85
  6. Step 6: Final answer
    x = 6,876.13

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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.