Home / 20,663.60-28,515.86-11,232.20

Finding the Fourth Proportional to 20,663.60, 28,515.86 and 11,232.20

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Solution

The fourth proportional to 20,663.60, 28,515.86 and 11,232.20 is: 15,500.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.60 : 28,515.86 = 11,232.20 : x
  2. Step 2: Convert to fraction form
    20,663.60/28,515.86 = 11,232.20/x
  3. Step 3: Cross multiply
    20,663.60x = 28,515.86 × 11,232.20
  4. Step 4: Simplify right side
    20,663.60x = 320,295,842.69
  5. Step 5: Solve for x
    x = 320,295,842.69/20,663.60
  6. Step 6: Final answer
    x = 15,500.49

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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.