Home / 15,331.54-21,157.33-8,618.30

Finding the Fourth Proportional to 15,331.54, 21,157.33 and 8,618.30

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Solution

The fourth proportional to 15,331.54, 21,157.33 and 8,618.30 is: 11,893.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,331.54 : 21,157.33 = 8,618.30 : x
  2. Step 2: Convert to fraction form
    15,331.54/21,157.33 = 8,618.30/x
  3. Step 3: Cross multiply
    15,331.54x = 21,157.33 × 8,618.30
  4. Step 4: Simplify right side
    15,331.54x = 182,340,217.14
  5. Step 5: Solve for x
    x = 182,340,217.14/15,331.54
  6. Step 6: Final answer
    x = 11,893.14

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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.