Home / 20,707.76-28,576.86-11,276.66

Finding the Fourth Proportional to 20,707.76, 28,576.86 and 11,276.66

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Solution

The fourth proportional to 20,707.76, 28,576.86 and 11,276.66 is: 15,561.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.76 : 28,576.86 = 11,276.66 : x
  2. Step 2: Convert to fraction form
    20,707.76/28,576.86 = 11,276.66/x
  3. Step 3: Cross multiply
    20,707.76x = 28,576.86 × 11,276.66
  4. Step 4: Simplify right side
    20,707.76x = 322,251,534.09
  5. Step 5: Solve for x
    x = 322,251,534.09/20,707.76
  6. Step 6: Final answer
    x = 15,561.87

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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.