Home / 20,685.34-28,545.75-11,253.94

Finding the Fourth Proportional to 20,685.34, 28,545.75 and 11,253.94

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Solution

The fourth proportional to 20,685.34, 28,545.75 and 11,253.94 is: 15,530.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.34 : 28,545.75 = 11,253.94 : x
  2. Step 2: Convert to fraction form
    20,685.34/28,545.75 = 11,253.94/x
  3. Step 3: Cross multiply
    20,685.34x = 28,545.75 × 11,253.94
  4. Step 4: Simplify right side
    20,685.34x = 321,252,157.76
  5. Step 5: Solve for x
    x = 321,252,157.76/20,685.34
  6. Step 6: Final answer
    x = 15,530.43

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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.