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Finding the Fourth Proportional to 18,340.31, 27,515.46 and 7,810.85

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Solution

The fourth proportional to 18,340.31, 27,515.46 and 7,810.85 is: 11,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,340.31 : 27,515.46 = 7,810.85 : x
  2. Step 2: Convert to fraction form
    18,340.31/27,515.46 = 7,810.85/x
  3. Step 3: Cross multiply
    18,340.31x = 27,515.46 × 7,810.85
  4. Step 4: Simplify right side
    18,340.31x = 214,918,993.16
  5. Step 5: Solve for x
    x = 214,918,993.16/18,340.31
  6. Step 6: Final answer
    x = 11,718.40

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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.