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Finding the Fourth Proportional to 7,871.45, 10,862.45 and 4,514.06

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Solution

The fourth proportional to 7,871.45, 10,862.45 and 4,514.06 is: 6,229.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.45 : 10,862.45 = 4,514.06 : x
  2. Step 2: Convert to fraction form
    7,871.45/10,862.45 = 4,514.06/x
  3. Step 3: Cross multiply
    7,871.45x = 10,862.45 × 4,514.06
  4. Step 4: Simplify right side
    7,871.45x = 49,033,751.05
  5. Step 5: Solve for x
    x = 49,033,751.05/7,871.45
  6. Step 6: Final answer
    x = 6,229.32

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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.