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Finding the Fourth Proportional to 15,811.11, 21,819.77 and 8,737.99

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Solution

The fourth proportional to 15,811.11, 21,819.77 and 8,737.99 is: 12,058.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.11 : 21,819.77 = 8,737.99 : x
  2. Step 2: Convert to fraction form
    15,811.11/21,819.77 = 8,737.99/x
  3. Step 3: Cross multiply
    15,811.11x = 21,819.77 × 8,737.99
  4. Step 4: Simplify right side
    15,811.11x = 190,660,932.06
  5. Step 5: Solve for x
    x = 190,660,932.06/15,811.11
  6. Step 6: Final answer
    x = 12,058.67

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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.