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Finding the Fourth Proportional to 18,807.80, 25,954.38 and 10,424.12

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Solution

The fourth proportional to 18,807.80, 25,954.38 and 10,424.12 is: 14,385.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,807.80 : 25,954.38 = 10,424.12 : x
  2. Step 2: Convert to fraction form
    18,807.80/25,954.38 = 10,424.12/x
  3. Step 3: Cross multiply
    18,807.80x = 25,954.38 × 10,424.12
  4. Step 4: Simplify right side
    18,807.80x = 270,551,571.65
  5. Step 5: Solve for x
    x = 270,551,571.65/18,807.80
  6. Step 6: Final answer
    x = 14,385.07

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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.