Home / 18,374.88-25,357.59-9,991.38

Finding the Fourth Proportional to 18,374.88, 25,357.59 and 9,991.38

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Solution

The fourth proportional to 18,374.88, 25,357.59 and 9,991.38 is: 13,788.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,374.88 : 25,357.59 = 9,991.38 : x
  2. Step 2: Convert to fraction form
    18,374.88/25,357.59 = 9,991.38/x
  3. Step 3: Cross multiply
    18,374.88x = 25,357.59 × 9,991.38
  4. Step 4: Simplify right side
    18,374.88x = 253,357,317.57
  5. Step 5: Solve for x
    x = 253,357,317.57/18,374.88
  6. Step 6: Final answer
    x = 13,788.24

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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.