Home / 15,447.72-21,317.82-8,374.20

Finding the Fourth Proportional to 15,447.72, 21,317.82 and 8,374.20

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Solution

The fourth proportional to 15,447.72, 21,317.82 and 8,374.20 is: 11,556.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,447.72 : 21,317.82 = 8,374.20 : x
  2. Step 2: Convert to fraction form
    15,447.72/21,317.82 = 8,374.20/x
  3. Step 3: Cross multiply
    15,447.72x = 21,317.82 × 8,374.20
  4. Step 4: Simplify right side
    15,447.72x = 178,519,688.24
  5. Step 5: Solve for x
    x = 178,519,688.24/15,447.72
  6. Step 6: Final answer
    x = 11,556.38

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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.