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Finding the Fourth Proportional to 12,389.92, 17,093.90 and 7,080.95

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Solution

The fourth proportional to 12,389.92, 17,093.90 and 7,080.95 is: 9,769.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,389.92 : 17,093.90 = 7,080.95 : x
  2. Step 2: Convert to fraction form
    12,389.92/17,093.90 = 7,080.95/x
  3. Step 3: Cross multiply
    12,389.92x = 17,093.90 × 7,080.95
  4. Step 4: Simplify right side
    12,389.92x = 121,041,015.80
  5. Step 5: Solve for x
    x = 121,041,015.80/12,389.92
  6. Step 6: Final answer
    x = 9,769.32

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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.