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Finding the Fourth Proportional to 12,520.48, 18,776.88 and 8,649.76

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Solution

The fourth proportional to 12,520.48, 18,776.88 and 8,649.76 is: 12,971.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,520.48 : 18,776.88 = 8,649.76 : x
  2. Step 2: Convert to fraction form
    12,520.48/18,776.88 = 8,649.76/x
  3. Step 3: Cross multiply
    12,520.48x = 18,776.88 × 8,649.76
  4. Step 4: Simplify right side
    12,520.48x = 162,415,505.55
  5. Step 5: Solve for x
    x = 162,415,505.55/12,520.48
  6. Step 6: Final answer
    x = 12,971.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.