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Finding the Fourth Proportional to 7,818.77, 10,789.65 and 4,281.77

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Solution

The fourth proportional to 7,818.77, 10,789.65 and 4,281.77 is: 5,908.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,818.77 : 10,789.65 = 4,281.77 : x
  2. Step 2: Convert to fraction form
    7,818.77/10,789.65 = 4,281.77/x
  3. Step 3: Cross multiply
    7,818.77x = 10,789.65 × 4,281.77
  4. Step 4: Simplify right side
    7,818.77x = 46,198,799.68
  5. Step 5: Solve for x
    x = 46,198,799.68/7,818.77
  6. Step 6: Final answer
    x = 5,908.70

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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.