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Finding the Fourth Proportional to 18,371.94, 25,353.20 and 9,988.44

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Solution

The fourth proportional to 18,371.94, 25,353.20 and 9,988.44 is: 13,784.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,371.94 : 25,353.20 = 9,988.44 : x
  2. Step 2: Convert to fraction form
    18,371.94/25,353.20 = 9,988.44/x
  3. Step 3: Cross multiply
    18,371.94x = 25,353.20 × 9,988.44
  4. Step 4: Simplify right side
    18,371.94x = 253,238,917.01
  5. Step 5: Solve for x
    x = 253,238,917.01/18,371.94
  6. Step 6: Final answer
    x = 13,784.01

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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.