Home / 8,889.20-12,278.80-6,818.88

Finding the Fourth Proportional to 8,889.20, 12,278.80 and 6,818.88

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Solution

The fourth proportional to 8,889.20, 12,278.80 and 6,818.88 is: 9,419.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,889.20 : 12,278.80 = 6,818.88 : x
  2. Step 2: Convert to fraction form
    8,889.20/12,278.80 = 6,818.88/x
  3. Step 3: Cross multiply
    8,889.20x = 12,278.80 × 6,818.88
  4. Step 4: Simplify right side
    8,889.20x = 83,727,663.74
  5. Step 5: Solve for x
    x = 83,727,663.74/8,889.20
  6. Step 6: Final answer
    x = 9,419.03

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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.