Home / 12,421.92-17,142.24-7,116.48

Finding the Fourth Proportional to 12,421.92, 17,142.24 and 7,116.48

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Solution

The fourth proportional to 12,421.92, 17,142.24 and 7,116.48 is: 9,820.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.92 : 17,142.24 = 7,116.48 : x
  2. Step 2: Convert to fraction form
    12,421.92/17,142.24 = 7,116.48/x
  3. Step 3: Cross multiply
    12,421.92x = 17,142.24 × 7,116.48
  4. Step 4: Simplify right side
    12,421.92x = 121,992,408.12
  5. Step 5: Solve for x
    x = 121,992,408.12/12,421.92
  6. Step 6: Final answer
    x = 9,820.74

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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.