Home / 12,312.20-16,989.60-7,006.76

Finding the Fourth Proportional to 12,312.20, 16,989.60 and 7,006.76

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Solution

The fourth proportional to 12,312.20, 16,989.60 and 7,006.76 is: 9,668.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,312.20 : 16,989.60 = 7,006.76 : x
  2. Step 2: Convert to fraction form
    12,312.20/16,989.60 = 7,006.76/x
  3. Step 3: Cross multiply
    12,312.20x = 16,989.60 × 7,006.76
  4. Step 4: Simplify right side
    12,312.20x = 119,042,049.70
  5. Step 5: Solve for x
    x = 119,042,049.70/12,312.20
  6. Step 6: Final answer
    x = 9,668.63

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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.