Home / 18,318.60-27,479.64-4,991.76

Finding the Fourth Proportional to 18,318.60, 27,479.64 and 4,991.76

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Solution

The fourth proportional to 18,318.60, 27,479.64 and 4,991.76 is: 7,488.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,318.60 : 27,479.64 = 4,991.76 : x
  2. Step 2: Convert to fraction form
    18,318.60/27,479.64 = 4,991.76/x
  3. Step 3: Cross multiply
    18,318.60x = 27,479.64 × 4,991.76
  4. Step 4: Simplify right side
    18,318.60x = 137,171,767.77
  5. Step 5: Solve for x
    x = 137,171,767.77/18,318.60
  6. Step 6: Final answer
    x = 7,488.11

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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.