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Finding the Fourth Proportional to 12,696.76, 17,521.50 and 7,031.80

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Solution

The fourth proportional to 12,696.76, 17,521.50 and 7,031.80 is: 9,703.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,696.76 : 17,521.50 = 7,031.80 : x
  2. Step 2: Convert to fraction form
    12,696.76/17,521.50 = 7,031.80/x
  3. Step 3: Cross multiply
    12,696.76x = 17,521.50 × 7,031.80
  4. Step 4: Simplify right side
    12,696.76x = 123,207,683.70
  5. Step 5: Solve for x
    x = 123,207,683.70/12,696.76
  6. Step 6: Final answer
    x = 9,703.87

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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.