Home / 8,128.76-11,215.92-4,726.39

Finding the Fourth Proportional to 8,128.76, 11,215.92 and 4,726.39

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Solution

The fourth proportional to 8,128.76, 11,215.92 and 4,726.39 is: 6,521.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.76 : 11,215.92 = 4,726.39 : x
  2. Step 2: Convert to fraction form
    8,128.76/11,215.92 = 4,726.39/x
  3. Step 3: Cross multiply
    8,128.76x = 11,215.92 × 4,726.39
  4. Step 4: Simplify right side
    8,128.76x = 53,010,812.13
  5. Step 5: Solve for x
    x = 53,010,812.13/8,128.76
  6. Step 6: Final answer
    x = 6,521.39

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Half scale
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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.