Home / 20,947.20-31,420.80-7,096.32

Finding the Fourth Proportional to 20,947.20, 31,420.80 and 7,096.32

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Solution

The fourth proportional to 20,947.20, 31,420.80 and 7,096.32 is: 10,644.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.20 : 31,420.80 = 7,096.32 : x
  2. Step 2: Convert to fraction form
    20,947.20/31,420.80 = 7,096.32/x
  3. Step 3: Cross multiply
    20,947.20x = 31,420.80 × 7,096.32
  4. Step 4: Simplify right side
    20,947.20x = 222,972,051.46
  5. Step 5: Solve for x
    x = 222,972,051.46/20,947.20
  6. Step 6: Final answer
    x = 10,644.48

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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.