Home / 20,772.32-28,666.48-11,341.60

Finding the Fourth Proportional to 20,772.32, 28,666.48 and 11,341.60

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Solution

The fourth proportional to 20,772.32, 28,666.48 and 11,341.60 is: 15,651.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.32 : 28,666.48 = 11,341.60 : x
  2. Step 2: Convert to fraction form
    20,772.32/28,666.48 = 11,341.60/x
  3. Step 3: Cross multiply
    20,772.32x = 28,666.48 × 11,341.60
  4. Step 4: Simplify right side
    20,772.32x = 325,123,749.57
  5. Step 5: Solve for x
    x = 325,123,749.57/20,772.32
  6. Step 6: Final answer
    x = 15,651.78

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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.