Home / 20,631.74-28,471.77-11,200.31

Finding the Fourth Proportional to 20,631.74, 28,471.77 and 11,200.31

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Solution

The fourth proportional to 20,631.74, 28,471.77 and 11,200.31 is: 15,456.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.74 : 28,471.77 = 11,200.31 : x
  2. Step 2: Convert to fraction form
    20,631.74/28,471.77 = 11,200.31/x
  3. Step 3: Cross multiply
    20,631.74x = 28,471.77 × 11,200.31
  4. Step 4: Simplify right side
    20,631.74x = 318,892,507.89
  5. Step 5: Solve for x
    x = 318,892,507.89/20,631.74
  6. Step 6: Final answer
    x = 15,456.41

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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.