Home / 15,505.06-21,396.89-8,431.48

Finding the Fourth Proportional to 15,505.06, 21,396.89 and 8,431.48

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Solution

The fourth proportional to 15,505.06, 21,396.89 and 8,431.48 is: 11,635.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.06 : 21,396.89 = 8,431.48 : x
  2. Step 2: Convert to fraction form
    15,505.06/21,396.89 = 8,431.48/x
  3. Step 3: Cross multiply
    15,505.06x = 21,396.89 × 8,431.48
  4. Step 4: Simplify right side
    15,505.06x = 180,407,450.10
  5. Step 5: Solve for x
    x = 180,407,450.10/15,505.06
  6. Step 6: Final answer
    x = 11,635.39

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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.