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Finding the Fourth Proportional to 7,145.87, 9,866.12 and 4,461.18

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Solution

The fourth proportional to 7,145.87, 9,866.12 and 4,461.18 is: 6,159.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.87 : 9,866.12 = 4,461.18 : x
  2. Step 2: Convert to fraction form
    7,145.87/9,866.12 = 4,461.18/x
  3. Step 3: Cross multiply
    7,145.87x = 9,866.12 × 4,461.18
  4. Step 4: Simplify right side
    7,145.87x = 44,014,514.92
  5. Step 5: Solve for x
    x = 44,014,514.92/7,145.87
  6. Step 6: Final answer
    x = 6,159.43

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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.