Home / 13,279.47-19,920.23-3,418.84

Finding the Fourth Proportional to 13,279.47, 19,920.23 and 3,418.84

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Solution

The fourth proportional to 13,279.47, 19,920.23 and 3,418.84 is: 5,128.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.47 : 19,920.23 = 3,418.84 : x
  2. Step 2: Convert to fraction form
    13,279.47/19,920.23 = 3,418.84/x
  3. Step 3: Cross multiply
    13,279.47x = 19,920.23 × 3,418.84
  4. Step 4: Simplify right side
    13,279.47x = 68,104,079.13
  5. Step 5: Solve for x
    x = 68,104,079.13/13,279.47
  6. Step 6: Final answer
    x = 5,128.52

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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.