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Finding the Fourth Proportional to 15,474.74, 21,354.90 and 8,401.10

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Solution

The fourth proportional to 15,474.74, 21,354.90 and 8,401.10 is: 11,593.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,474.74 : 21,354.90 = 8,401.10 : x
  2. Step 2: Convert to fraction form
    15,474.74/21,354.90 = 8,401.10/x
  3. Step 3: Cross multiply
    15,474.74x = 21,354.90 × 8,401.10
  4. Step 4: Simplify right side
    15,474.74x = 179,404,650.39
  5. Step 5: Solve for x
    x = 179,404,650.39/15,474.74
  6. Step 6: Final answer
    x = 11,593.39

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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.