Home / 20,707.29-28,576.10-11,275.89

Finding the Fourth Proportional to 20,707.29, 28,576.10 and 11,275.89

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Solution

The fourth proportional to 20,707.29, 28,576.10 and 11,275.89 is: 15,560.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.29 : 28,576.10 = 11,275.89 : x
  2. Step 2: Convert to fraction form
    20,707.29/28,576.10 = 11,275.89/x
  3. Step 3: Cross multiply
    20,707.29x = 28,576.10 × 11,275.89
  4. Step 4: Simplify right side
    20,707.29x = 322,220,903.85
  5. Step 5: Solve for x
    x = 322,220,903.85/20,707.29
  6. Step 6: Final answer
    x = 15,560.75

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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.