Home / 20,955.16-31,432.74-13,169.44

Finding the Fourth Proportional to 20,955.16, 31,432.74 and 13,169.44

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Solution

The fourth proportional to 20,955.16, 31,432.74 and 13,169.44 is: 19,754.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,955.16 : 31,432.74 = 13,169.44 : x
  2. Step 2: Convert to fraction form
    20,955.16/31,432.74 = 13,169.44/x
  3. Step 3: Cross multiply
    20,955.16x = 31,432.74 × 13,169.44
  4. Step 4: Simplify right side
    20,955.16x = 413,951,583.47
  5. Step 5: Solve for x
    x = 413,951,583.47/20,955.16
  6. Step 6: Final answer
    x = 19,754.16

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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.