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Finding the Fourth Proportional to 18,807.84, 25,961.56 and 12,835.24

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Solution

The fourth proportional to 18,807.84, 25,961.56 and 12,835.24 is: 17,717.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,807.84 : 25,961.56 = 12,835.24 : x
  2. Step 2: Convert to fraction form
    18,807.84/25,961.56 = 12,835.24/x
  3. Step 3: Cross multiply
    18,807.84x = 25,961.56 × 12,835.24
  4. Step 4: Simplify right side
    18,807.84x = 333,222,853.37
  5. Step 5: Solve for x
    x = 333,222,853.37/18,807.84
  6. Step 6: Final answer
    x = 17,717.23

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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.