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Finding the Fourth Proportional to 18,375.84, 25,358.48 and 9,992.40

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Solution

The fourth proportional to 18,375.84, 25,358.48 and 9,992.40 is: 13,789.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,375.84 : 25,358.48 = 9,992.40 : x
  2. Step 2: Convert to fraction form
    18,375.84/25,358.48 = 9,992.40/x
  3. Step 3: Cross multiply
    18,375.84x = 25,358.48 × 9,992.40
  4. Step 4: Simplify right side
    18,375.84x = 253,392,075.55
  5. Step 5: Solve for x
    x = 253,392,075.55/18,375.84
  6. Step 6: Final answer
    x = 13,789.41

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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.