Home / 18,438.95-27,660.72-5,291.57

Finding the Fourth Proportional to 18,438.95, 27,660.72 and 5,291.57

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Solution

The fourth proportional to 18,438.95, 27,660.72 and 5,291.57 is: 7,938.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.95 : 27,660.72 = 5,291.57 : x
  2. Step 2: Convert to fraction form
    18,438.95/27,660.72 = 5,291.57/x
  3. Step 3: Cross multiply
    18,438.95x = 27,660.72 × 5,291.57
  4. Step 4: Simplify right side
    18,438.95x = 146,368,636.13
  5. Step 5: Solve for x
    x = 146,368,636.13/18,438.95
  6. Step 6: Final answer
    x = 7,938.01

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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.