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Finding the Fourth Proportional to 12,395.76, 18,550.17 and 8,889.72

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Solution

The fourth proportional to 12,395.76, 18,550.17 and 8,889.72 is: 13,303.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,395.76 : 18,550.17 = 8,889.72 : x
  2. Step 2: Convert to fraction form
    12,395.76/18,550.17 = 8,889.72/x
  3. Step 3: Cross multiply
    12,395.76x = 18,550.17 × 8,889.72
  4. Step 4: Simplify right side
    12,395.76x = 164,905,817.25
  5. Step 5: Solve for x
    x = 164,905,817.25/12,395.76
  6. Step 6: Final answer
    x = 13,303.41

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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.