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Finding the Fourth Proportional to 18,374.58, 25,357.08 and 9,991.08

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Solution

The fourth proportional to 18,374.58, 25,357.08 and 9,991.08 is: 13,787.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,374.58 : 25,357.08 = 9,991.08 : x
  2. Step 2: Convert to fraction form
    18,374.58/25,357.08 = 9,991.08/x
  3. Step 3: Cross multiply
    18,374.58x = 25,357.08 × 9,991.08
  4. Step 4: Simplify right side
    18,374.58x = 253,344,614.85
  5. Step 5: Solve for x
    x = 253,344,614.85/18,374.58
  6. Step 6: Final answer
    x = 13,787.78

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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.