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Finding the Fourth Proportional to 20,012.91, 29,986.48 and 6,858.10

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Solution

The fourth proportional to 20,012.91, 29,986.48 and 6,858.10 is: 10,275.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,012.91 : 29,986.48 = 6,858.10 : x
  2. Step 2: Convert to fraction form
    20,012.91/29,986.48 = 6,858.10/x
  3. Step 3: Cross multiply
    20,012.91x = 29,986.48 × 6,858.10
  4. Step 4: Simplify right side
    20,012.91x = 205,650,278.49
  5. Step 5: Solve for x
    x = 205,650,278.49/20,012.91
  6. Step 6: Final answer
    x = 10,275.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.