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Finding the Fourth Proportional to 18,281.81, 25,220.18 and 11,906.10

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Solution

The fourth proportional to 18,281.81, 25,220.18 and 11,906.10 is: 16,424.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,281.81 : 25,220.18 = 11,906.10 : x
  2. Step 2: Convert to fraction form
    18,281.81/25,220.18 = 11,906.10/x
  3. Step 3: Cross multiply
    18,281.81x = 25,220.18 × 11,906.10
  4. Step 4: Simplify right side
    18,281.81x = 300,273,925.57
  5. Step 5: Solve for x
    x = 300,273,925.57/18,281.81
  6. Step 6: Final answer
    x = 16,424.74

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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.