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Finding the Fourth Proportional to 8,859.92, 12,228.45 and 5,275.76

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Solution

The fourth proportional to 8,859.92, 12,228.45 and 5,275.76 is: 7,281.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,859.92 : 12,228.45 = 5,275.76 : x
  2. Step 2: Convert to fraction form
    8,859.92/12,228.45 = 5,275.76/x
  3. Step 3: Cross multiply
    8,859.92x = 12,228.45 × 5,275.76
  4. Step 4: Simplify right side
    8,859.92x = 64,514,367.37
  5. Step 5: Solve for x
    x = 64,514,367.37/8,859.92
  6. Step 6: Final answer
    x = 7,281.60

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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.