Home / 20,965.20-31,447.80-7,114.32

Finding the Fourth Proportional to 20,965.20, 31,447.80 and 7,114.32

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Solution

The fourth proportional to 20,965.20, 31,447.80 and 7,114.32 is: 10,671.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.20 : 31,447.80 = 7,114.32 : x
  2. Step 2: Convert to fraction form
    20,965.20/31,447.80 = 7,114.32/x
  3. Step 3: Cross multiply
    20,965.20x = 31,447.80 × 7,114.32
  4. Step 4: Simplify right side
    20,965.20x = 223,729,712.50
  5. Step 5: Solve for x
    x = 223,729,712.50/20,965.20
  6. Step 6: Final answer
    x = 10,671.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.