Home / 13,389.62-18,479.85-12,799.04

Finding the Fourth Proportional to 13,389.62, 18,479.85 and 12,799.04

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Solution

The fourth proportional to 13,389.62, 18,479.85 and 12,799.04 is: 17,664.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.62 : 18,479.85 = 12,799.04 : x
  2. Step 2: Convert to fraction form
    13,389.62/18,479.85 = 12,799.04/x
  3. Step 3: Cross multiply
    13,389.62x = 18,479.85 × 12,799.04
  4. Step 4: Simplify right side
    13,389.62x = 236,524,339.34
  5. Step 5: Solve for x
    x = 236,524,339.34/13,389.62
  6. Step 6: Final answer
    x = 17,664.75

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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.