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Finding the Fourth Proportional to 28,527.69, 42,789.11 and 8,806.40

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Solution

The fourth proportional to 28,527.69, 42,789.11 and 8,806.40 is: 13,208.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,527.69 : 42,789.11 = 8,806.40 : x
  2. Step 2: Convert to fraction form
    28,527.69/42,789.11 = 8,806.40/x
  3. Step 3: Cross multiply
    28,527.69x = 42,789.11 × 8,806.40
  4. Step 4: Simplify right side
    28,527.69x = 376,817,760.33
  5. Step 5: Solve for x
    x = 376,817,760.33/28,527.69
  6. Step 6: Final answer
    x = 13,208.84

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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.