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Finding the Fourth Proportional to 28,400.76, 39,162.29 and 19,332

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Solution

The fourth proportional to 28,400.76, 39,162.29 and 19,332 is: 26,657.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,400.76 : 39,162.29 = 19,332 : x
  2. Step 2: Convert to fraction form
    28,400.76/39,162.29 = 19,332/x
  3. Step 3: Cross multiply
    28,400.76x = 39,162.29 × 19,332
  4. Step 4: Simplify right side
    28,400.76x = 757,085,293.62
  5. Step 5: Solve for x
    x = 757,085,293.62/28,400.76
  6. Step 6: Final answer
    x = 26,657.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.