Home / 20,991.44-31,490.04-9,304.40

Finding the Fourth Proportional to 20,991.44, 31,490.04 and 9,304.40

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Solution

The fourth proportional to 20,991.44, 31,490.04 and 9,304.40 is: 13,957.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.44 : 31,490.04 = 9,304.40 : x
  2. Step 2: Convert to fraction form
    20,991.44/31,490.04 = 9,304.40/x
  3. Step 3: Cross multiply
    20,991.44x = 31,490.04 × 9,304.40
  4. Step 4: Simplify right side
    20,991.44x = 292,995,928.18
  5. Step 5: Solve for x
    x = 292,995,928.18/20,991.44
  6. Step 6: Final answer
    x = 13,957.88

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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.