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Finding the Fourth Proportional to 18,808.10, 28,212.14 and 5,669.69

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Solution

The fourth proportional to 18,808.10, 28,212.14 and 5,669.69 is: 8,504.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.10 : 28,212.14 = 5,669.69 : x
  2. Step 2: Convert to fraction form
    18,808.10/28,212.14 = 5,669.69/x
  3. Step 3: Cross multiply
    18,808.10x = 28,212.14 × 5,669.69
  4. Step 4: Simplify right side
    18,808.10x = 159,954,088.04
  5. Step 5: Solve for x
    x = 159,954,088.04/18,808.10
  6. Step 6: Final answer
    x = 8,504.53

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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.