Home / 12,408.24-17,131.20-8,630.40

Finding the Fourth Proportional to 12,408.24, 17,131.20 and 8,630.40

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Solution

The fourth proportional to 12,408.24, 17,131.20 and 8,630.40 is: 11,915.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408.24 : 17,131.20 = 8,630.40 : x
  2. Step 2: Convert to fraction form
    12,408.24/17,131.20 = 8,630.40/x
  3. Step 3: Cross multiply
    12,408.24x = 17,131.20 × 8,630.40
  4. Step 4: Simplify right side
    12,408.24x = 147,849,108.48
  5. Step 5: Solve for x
    x = 147,849,108.48/12,408.24
  6. Step 6: Final answer
    x = 11,915.40

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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.