Home / 20,772.18-28,665.50-11,340.68

Finding the Fourth Proportional to 20,772.18, 28,665.50 and 11,340.68

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Solution

The fourth proportional to 20,772.18, 28,665.50 and 11,340.68 is: 15,650.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.18 : 28,665.50 = 11,340.68 : x
  2. Step 2: Convert to fraction form
    20,772.18/28,665.50 = 11,340.68/x
  3. Step 3: Cross multiply
    20,772.18x = 28,665.50 × 11,340.68
  4. Step 4: Simplify right side
    20,772.18x = 325,086,062.51
  5. Step 5: Solve for x
    x = 325,086,062.51/20,772.18
  6. Step 6: Final answer
    x = 15,650.07

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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.