Home / 20,920.74-31,386.06-6,880.82

Finding the Fourth Proportional to 20,920.74, 31,386.06 and 6,880.82

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Solution

The fourth proportional to 20,920.74, 31,386.06 and 6,880.82 is: 10,322.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.74 : 31,386.06 = 6,880.82 : x
  2. Step 2: Convert to fraction form
    20,920.74/31,386.06 = 6,880.82/x
  3. Step 3: Cross multiply
    20,920.74x = 31,386.06 × 6,880.82
  4. Step 4: Simplify right side
    20,920.74x = 215,961,672.44
  5. Step 5: Solve for x
    x = 215,961,672.44/20,920.74
  6. Step 6: Final answer
    x = 10,322.85

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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.