Home / 20,921.84-31,382.72-5,339.46

Finding the Fourth Proportional to 20,921.84, 31,382.72 and 5,339.46

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Solution

The fourth proportional to 20,921.84, 31,382.72 and 5,339.46 is: 8,009.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.84 : 31,382.72 = 5,339.46 : x
  2. Step 2: Convert to fraction form
    20,921.84/31,382.72 = 5,339.46/x
  3. Step 3: Cross multiply
    20,921.84x = 31,382.72 × 5,339.46
  4. Step 4: Simplify right side
    20,921.84x = 167,566,778.13
  5. Step 5: Solve for x
    x = 167,566,778.13/20,921.84
  6. Step 6: Final answer
    x = 8,009.18

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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.