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Finding the Fourth Proportional to 12,465.78, 17,193.75 and 8,479.80

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Solution

The fourth proportional to 12,465.78, 17,193.75 and 8,479.80 is: 11,695.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,465.78 : 17,193.75 = 8,479.80 : x
  2. Step 2: Convert to fraction form
    12,465.78/17,193.75 = 8,479.80/x
  3. Step 3: Cross multiply
    12,465.78x = 17,193.75 × 8,479.80
  4. Step 4: Simplify right side
    12,465.78x = 145,799,561.25
  5. Step 5: Solve for x
    x = 145,799,561.25/12,465.78
  6. Step 6: Final answer
    x = 11,695.98

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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.