Home / 15,504.95-21,396.90-8,431.34

Finding the Fourth Proportional to 15,504.95, 21,396.90 and 8,431.34

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Solution

The fourth proportional to 15,504.95, 21,396.90 and 8,431.34 is: 11,635.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,504.95 : 21,396.90 = 8,431.34 : x
  2. Step 2: Convert to fraction form
    15,504.95/21,396.90 = 8,431.34/x
  3. Step 3: Cross multiply
    15,504.95x = 21,396.90 × 8,431.34
  4. Step 4: Simplify right side
    15,504.95x = 180,404,538.85
  5. Step 5: Solve for x
    x = 180,404,538.85/15,504.95
  6. Step 6: Final answer
    x = 11,635.29

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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.