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Finding the Fourth Proportional to 28,530.72, 42,793.92 and 8,814.24

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Solution

The fourth proportional to 28,530.72, 42,793.92 and 8,814.24 is: 13,220.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,530.72 : 42,793.92 = 8,814.24 : x
  2. Step 2: Convert to fraction form
    28,530.72/42,793.92 = 8,814.24/x
  3. Step 3: Cross multiply
    28,530.72x = 42,793.92 × 8,814.24
  4. Step 4: Simplify right side
    28,530.72x = 377,195,881.42
  5. Step 5: Solve for x
    x = 377,195,881.42/28,530.72
  6. Step 6: Final answer
    x = 13,220.69

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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.