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Finding the Fourth Proportional to 7,012.80, 9,677.76 and 3,868.92

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Solution

The fourth proportional to 7,012.80, 9,677.76 and 3,868.92 is: 5,339.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,012.80 : 9,677.76 = 3,868.92 : x
  2. Step 2: Convert to fraction form
    7,012.80/9,677.76 = 3,868.92/x
  3. Step 3: Cross multiply
    7,012.80x = 9,677.76 × 3,868.92
  4. Step 4: Simplify right side
    7,012.80x = 37,442,479.22
  5. Step 5: Solve for x
    x = 37,442,479.22/7,012.80
  6. Step 6: Final answer
    x = 5,339.16

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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.