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Finding the Fourth Proportional to 17,776.11, 26,671.95 and 8,422.81

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Solution

The fourth proportional to 17,776.11, 26,671.95 and 8,422.81 is: 12,637.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,776.11 : 26,671.95 = 8,422.81 : x
  2. Step 2: Convert to fraction form
    17,776.11/26,671.95 = 8,422.81/x
  3. Step 3: Cross multiply
    17,776.11x = 26,671.95 × 8,422.81
  4. Step 4: Simplify right side
    17,776.11x = 224,652,700.50
  5. Step 5: Solve for x
    x = 224,652,700.50/17,776.11
  6. Step 6: Final answer
    x = 12,637.90

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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.