Home / 20,731.56-31,097.34-11,555.88

Finding the Fourth Proportional to 20,731.56, 31,097.34 and 11,555.88

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Solution

The fourth proportional to 20,731.56, 31,097.34 and 11,555.88 is: 17,333.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.56 : 31,097.34 = 11,555.88 : x
  2. Step 2: Convert to fraction form
    20,731.56/31,097.34 = 11,555.88/x
  3. Step 3: Cross multiply
    20,731.56x = 31,097.34 × 11,555.88
  4. Step 4: Simplify right side
    20,731.56x = 359,357,129.36
  5. Step 5: Solve for x
    x = 359,357,129.36/20,731.56
  6. Step 6: Final answer
    x = 17,333.82

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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.