Home / 15,464.12-21,339.90-8,390.39

Finding the Fourth Proportional to 15,464.12, 21,339.90 and 8,390.39

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Solution

The fourth proportional to 15,464.12, 21,339.90 and 8,390.39 is: 11,578.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,464.12 : 21,339.90 = 8,390.39 : x
  2. Step 2: Convert to fraction form
    15,464.12/21,339.90 = 8,390.39/x
  3. Step 3: Cross multiply
    15,464.12x = 21,339.90 × 8,390.39
  4. Step 4: Simplify right side
    15,464.12x = 179,050,083.56
  5. Step 5: Solve for x
    x = 179,050,083.56/15,464.12
  6. Step 6: Final answer
    x = 11,578.42

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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.