Home / 20,959.66-31,443.40-6,920.68

Finding the Fourth Proportional to 20,959.66, 31,443.40 and 6,920.68

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Solution

The fourth proportional to 20,959.66, 31,443.40 and 6,920.68 is: 10,382.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.66 : 31,443.40 = 6,920.68 : x
  2. Step 2: Convert to fraction form
    20,959.66/31,443.40 = 6,920.68/x
  3. Step 3: Cross multiply
    20,959.66x = 31,443.40 × 6,920.68
  4. Step 4: Simplify right side
    20,959.66x = 217,609,709.51
  5. Step 5: Solve for x
    x = 217,609,709.51/20,959.66
  6. Step 6: Final answer
    x = 10,382.31

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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.