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Finding the Fourth Proportional to 12,388.92, 17,092.51 and 7,079.95

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Solution

The fourth proportional to 12,388.92, 17,092.51 and 7,079.95 is: 9,767.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,388.92 : 17,092.51 = 7,079.95 : x
  2. Step 2: Convert to fraction form
    12,388.92/17,092.51 = 7,079.95/x
  3. Step 3: Cross multiply
    12,388.92x = 17,092.51 × 7,079.95
  4. Step 4: Simplify right side
    12,388.92x = 121,014,116.17
  5. Step 5: Solve for x
    x = 121,014,116.17/12,388.92
  6. Step 6: Final answer
    x = 9,767.93

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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.