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Finding the Fourth Proportional to 18,783.72, 28,189.85 and 6,948.69

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Solution

The fourth proportional to 18,783.72, 28,189.85 and 6,948.69 is: 10,428.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.72 : 28,189.85 = 6,948.69 : x
  2. Step 2: Convert to fraction form
    18,783.72/28,189.85 = 6,948.69/x
  3. Step 3: Cross multiply
    18,783.72x = 28,189.85 × 6,948.69
  4. Step 4: Simplify right side
    18,783.72x = 195,882,528.80
  5. Step 5: Solve for x
    x = 195,882,528.80/18,783.72
  6. Step 6: Final answer
    x = 10,428.31

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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.