Home / 15,505.07-21,396.34-8,791.15

Finding the Fourth Proportional to 15,505.07, 21,396.34 and 8,791.15

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Solution

The fourth proportional to 15,505.07, 21,396.34 and 8,791.15 is: 12,131.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.07 : 21,396.34 = 8,791.15 : x
  2. Step 2: Convert to fraction form
    15,505.07/21,396.34 = 8,791.15/x
  3. Step 3: Cross multiply
    15,505.07x = 21,396.34 × 8,791.15
  4. Step 4: Simplify right side
    15,505.07x = 188,098,327.41
  5. Step 5: Solve for x
    x = 188,098,327.41/15,505.07
  6. Step 6: Final answer
    x = 12,131.41

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1.5x scale

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.