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Finding the Fourth Proportional to 28,377.83, 42,569.19 and 7,317.69

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Solution

The fourth proportional to 28,377.83, 42,569.19 and 7,317.69 is: 10,977.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,377.83 : 42,569.19 = 7,317.69 : x
  2. Step 2: Convert to fraction form
    28,377.83/42,569.19 = 7,317.69/x
  3. Step 3: Cross multiply
    28,377.83x = 42,569.19 × 7,317.69
  4. Step 4: Simplify right side
    28,377.83x = 311,508,135.97
  5. Step 5: Solve for x
    x = 311,508,135.97/28,377.83
  6. Step 6: Final answer
    x = 10,977.17

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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.