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Finding the Fourth Proportional to 12,465.99, 17,197.79 and 7,988.31

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Solution

The fourth proportional to 12,465.99, 17,197.79 and 7,988.31 is: 11,020.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,465.99 : 17,197.79 = 7,988.31 : x
  2. Step 2: Convert to fraction form
    12,465.99/17,197.79 = 7,988.31/x
  3. Step 3: Cross multiply
    12,465.99x = 17,197.79 × 7,988.31
  4. Step 4: Simplify right side
    12,465.99x = 137,381,237.89
  5. Step 5: Solve for x
    x = 137,381,237.89/12,465.99
  6. Step 6: Final answer
    x = 11,020.48

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Similar ratio
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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.