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Finding the Fourth Proportional to 6,889.80, 10,309.14 and 4,117.92

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Solution

The fourth proportional to 6,889.80, 10,309.14 and 4,117.92 is: 6,161.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,889.80 : 10,309.14 = 4,117.92 : x
  2. Step 2: Convert to fraction form
    6,889.80/10,309.14 = 4,117.92/x
  3. Step 3: Cross multiply
    6,889.80x = 10,309.14 × 4,117.92
  4. Step 4: Simplify right side
    6,889.80x = 42,452,213.79
  5. Step 5: Solve for x
    x = 42,452,213.79/6,889.80
  6. Step 6: Final answer
    x = 6,161.60

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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.