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Finding the Fourth Proportional to 15,474.86, 21,355.74 and 8,401.74

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Solution

The fourth proportional to 15,474.86, 21,355.74 and 8,401.74 is: 11,594.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,474.86 : 21,355.74 = 8,401.74 : x
  2. Step 2: Convert to fraction form
    15,474.86/21,355.74 = 8,401.74/x
  3. Step 3: Cross multiply
    15,474.86x = 21,355.74 × 8,401.74
  4. Step 4: Simplify right side
    15,474.86x = 179,425,374.99
  5. Step 5: Solve for x
    x = 179,425,374.99/15,474.86
  6. Step 6: Final answer
    x = 11,594.64

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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.