Home / 12,479.93-17,221.57-6,813.56

Finding the Fourth Proportional to 12,479.93, 17,221.57 and 6,813.56

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Solution

The fourth proportional to 12,479.93, 17,221.57 and 6,813.56 is: 9,402.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.93 : 17,221.57 = 6,813.56 : x
  2. Step 2: Convert to fraction form
    12,479.93/17,221.57 = 6,813.56/x
  3. Step 3: Cross multiply
    12,479.93x = 17,221.57 × 6,813.56
  4. Step 4: Simplify right side
    12,479.93x = 117,340,200.49
  5. Step 5: Solve for x
    x = 117,340,200.49/12,479.93
  6. Step 6: Final answer
    x = 9,402.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.