Home / 13,391.22-18,479.40-7,423.44

Finding the Fourth Proportional to 13,391.22, 18,479.40 and 7,423.44

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Solution

The fourth proportional to 13,391.22, 18,479.40 and 7,423.44 is: 10,244.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.22 : 18,479.40 = 7,423.44 : x
  2. Step 2: Convert to fraction form
    13,391.22/18,479.40 = 7,423.44/x
  3. Step 3: Cross multiply
    13,391.22x = 18,479.40 × 7,423.44
  4. Step 4: Simplify right side
    13,391.22x = 137,180,717.14
  5. Step 5: Solve for x
    x = 137,180,717.14/13,391.22
  6. Step 6: Final answer
    x = 10,244.08

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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.