Home / 13,390.08-18,478.53-7,422

Finding the Fourth Proportional to 13,390.08, 18,478.53 and 7,422

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Solution

The fourth proportional to 13,390.08, 18,478.53 and 7,422 is: 10,242.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.08 : 18,478.53 = 7,422 : x
  2. Step 2: Convert to fraction form
    13,390.08/18,478.53 = 7,422/x
  3. Step 3: Cross multiply
    13,390.08x = 18,478.53 × 7,422
  4. Step 4: Simplify right side
    13,390.08x = 137,147,649.66
  5. Step 5: Solve for x
    x = 137,147,649.66/13,390.08
  6. Step 6: Final answer
    x = 10,242.48

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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.