Home / 20,631.48-28,471.96-11,200.04

Finding the Fourth Proportional to 20,631.48, 28,471.96 and 11,200.04

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Solution

The fourth proportional to 20,631.48, 28,471.96 and 11,200.04 is: 15,456.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.48 : 28,471.96 = 11,200.04 : x
  2. Step 2: Convert to fraction form
    20,631.48/28,471.96 = 11,200.04/x
  3. Step 3: Cross multiply
    20,631.48x = 28,471.96 × 11,200.04
  4. Step 4: Simplify right side
    20,631.48x = 318,887,090.88
  5. Step 5: Solve for x
    x = 318,887,090.88/20,631.48
  6. Step 6: Final answer
    x = 15,456.34

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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.