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Finding the Fourth Proportional to 12,663.66, 18,985.09 and 8,225.90

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Solution

The fourth proportional to 12,663.66, 18,985.09 and 8,225.90 is: 12,332.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,663.66 : 18,985.09 = 8,225.90 : x
  2. Step 2: Convert to fraction form
    12,663.66/18,985.09 = 8,225.90/x
  3. Step 3: Cross multiply
    12,663.66x = 18,985.09 × 8,225.90
  4. Step 4: Simplify right side
    12,663.66x = 156,169,451.83
  5. Step 5: Solve for x
    x = 156,169,451.83/12,663.66
  6. Step 6: Final answer
    x = 12,332.09

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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.