Home / 20,772.30-28,665.78-11,340.87

Finding the Fourth Proportional to 20,772.30, 28,665.78 and 11,340.87

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Solution

The fourth proportional to 20,772.30, 28,665.78 and 11,340.87 is: 15,650.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.30 : 28,665.78 = 11,340.87 : x
  2. Step 2: Convert to fraction form
    20,772.30/28,665.78 = 11,340.87/x
  3. Step 3: Cross multiply
    20,772.30x = 28,665.78 × 11,340.87
  4. Step 4: Simplify right side
    20,772.30x = 325,094,884.43
  5. Step 5: Solve for x
    x = 325,094,884.43/20,772.30
  6. Step 6: Final answer
    x = 15,650.40

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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.