Home / 18,408.72-25,405.80-11,339.28

Finding the Fourth Proportional to 18,408.72, 25,405.80 and 11,339.28

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Solution

The fourth proportional to 18,408.72, 25,405.80 and 11,339.28 is: 15,649.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,408.72 : 25,405.80 = 11,339.28 : x
  2. Step 2: Convert to fraction form
    18,408.72/25,405.80 = 11,339.28/x
  3. Step 3: Cross multiply
    18,408.72x = 25,405.80 × 11,339.28
  4. Step 4: Simplify right side
    18,408.72x = 288,083,479.82
  5. Step 5: Solve for x
    x = 288,083,479.82/18,408.72
  6. Step 6: Final answer
    x = 15,649.29

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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.