Home / 20,920.19-31,382.03-6,690.68

Finding the Fourth Proportional to 20,920.19, 31,382.03 and 6,690.68

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Solution

The fourth proportional to 20,920.19, 31,382.03 and 6,690.68 is: 10,036.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.19 : 31,382.03 = 6,690.68 : x
  2. Step 2: Convert to fraction form
    20,920.19/31,382.03 = 6,690.68/x
  3. Step 3: Cross multiply
    20,920.19x = 31,382.03 × 6,690.68
  4. Step 4: Simplify right side
    20,920.19x = 209,967,215.66
  5. Step 5: Solve for x
    x = 209,967,215.66/20,920.19
  6. Step 6: Final answer
    x = 10,036.58

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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.