Home / 20,685.06-28,545.48-11,253.69

Finding the Fourth Proportional to 20,685.06, 28,545.48 and 11,253.69

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Solution

The fourth proportional to 20,685.06, 28,545.48 and 11,253.69 is: 15,530.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.06 : 28,545.48 = 11,253.69 : x
  2. Step 2: Convert to fraction form
    20,685.06/28,545.48 = 11,253.69/x
  3. Step 3: Cross multiply
    20,685.06x = 28,545.48 × 11,253.69
  4. Step 4: Simplify right side
    20,685.06x = 321,241,982.82
  5. Step 5: Solve for x
    x = 321,241,982.82/20,685.06
  6. Step 6: Final answer
    x = 15,530.15

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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.