Home / 15,376.78-21,217.60-8,661.98

Finding the Fourth Proportional to 15,376.78, 21,217.60 and 8,661.98

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Solution

The fourth proportional to 15,376.78, 21,217.60 and 8,661.98 is: 11,952.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,376.78 : 21,217.60 = 8,661.98 : x
  2. Step 2: Convert to fraction form
    15,376.78/21,217.60 = 8,661.98/x
  3. Step 3: Cross multiply
    15,376.78x = 21,217.60 × 8,661.98
  4. Step 4: Simplify right side
    15,376.78x = 183,786,426.85
  5. Step 5: Solve for x
    x = 183,786,426.85/15,376.78
  6. Step 6: Final answer
    x = 11,952.21

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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.