Home / 12,309.24-16,984.50-8,115

Finding the Fourth Proportional to 12,309.24, 16,984.50 and 8,115

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Solution

The fourth proportional to 12,309.24, 16,984.50 and 8,115 is: 11,197.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,309.24 : 16,984.50 = 8,115 : x
  2. Step 2: Convert to fraction form
    12,309.24/16,984.50 = 8,115/x
  3. Step 3: Cross multiply
    12,309.24x = 16,984.50 × 8,115
  4. Step 4: Simplify right side
    12,309.24x = 137,829,217.50
  5. Step 5: Solve for x
    x = 137,829,217.50/12,309.24
  6. Step 6: Final answer
    x = 11,197.22

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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.