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Finding the Fourth Proportional to 28,470.76, 42,708.38 and 7,693.96

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Solution

The fourth proportional to 28,470.76, 42,708.38 and 7,693.96 is: 11,541.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,470.76 : 42,708.38 = 7,693.96 : x
  2. Step 2: Convert to fraction form
    28,470.76/42,708.38 = 7,693.96/x
  3. Step 3: Cross multiply
    28,470.76x = 42,708.38 × 7,693.96
  4. Step 4: Simplify right side
    28,470.76x = 328,596,567.38
  5. Step 5: Solve for x
    x = 328,596,567.38/28,470.76
  6. Step 6: Final answer
    x = 11,541.55

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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.