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Finding the Fourth Proportional to 15,498.22, 21,388 and 8,783.63

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Solution

The fourth proportional to 15,498.22, 21,388 and 8,783.63 is: 12,121.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,498.22 : 21,388 = 8,783.63 : x
  2. Step 2: Convert to fraction form
    15,498.22/21,388 = 8,783.63/x
  3. Step 3: Cross multiply
    15,498.22x = 21,388 × 8,783.63
  4. Step 4: Simplify right side
    15,498.22x = 187,864,278.44
  5. Step 5: Solve for x
    x = 187,864,278.44/15,498.22
  6. Step 6: Final answer
    x = 12,121.67

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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.