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Finding the Fourth Proportional to 18,417.87, 27,637.74 and 7,321.58

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Solution

The fourth proportional to 18,417.87, 27,637.74 and 7,321.58 is: 10,986.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,417.87 : 27,637.74 = 7,321.58 : x
  2. Step 2: Convert to fraction form
    18,417.87/27,637.74 = 7,321.58/x
  3. Step 3: Cross multiply
    18,417.87x = 27,637.74 × 7,321.58
  4. Step 4: Simplify right side
    18,417.87x = 202,351,924.43
  5. Step 5: Solve for x
    x = 202,351,924.43/18,417.87
  6. Step 6: Final answer
    x = 10,986.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.