Home / 15,394.13-21,243.46-8,679.69

Finding the Fourth Proportional to 15,394.13, 21,243.46 and 8,679.69

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Solution

The fourth proportional to 15,394.13, 21,243.46 and 8,679.69 is: 11,977.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,394.13 : 21,243.46 = 8,679.69 : x
  2. Step 2: Convert to fraction form
    15,394.13/21,243.46 = 8,679.69/x
  3. Step 3: Cross multiply
    15,394.13x = 21,243.46 × 8,679.69
  4. Step 4: Simplify right side
    15,394.13x = 184,386,647.33
  5. Step 5: Solve for x
    x = 184,386,647.33/15,394.13
  6. Step 6: Final answer
    x = 11,977.73

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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.