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Finding the Fourth Proportional to 28,484.70, 42,694.47 and 17,815.90

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Solution

The fourth proportional to 28,484.70, 42,694.47 and 17,815.90 is: 26,703.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,484.70 : 42,694.47 = 17,815.90 : x
  2. Step 2: Convert to fraction form
    28,484.70/42,694.47 = 17,815.90/x
  3. Step 3: Cross multiply
    28,484.70x = 42,694.47 × 17,815.90
  4. Step 4: Simplify right side
    28,484.70x = 760,640,331.28
  5. Step 5: Solve for x
    x = 760,640,331.28/28,484.70
  6. Step 6: Final answer
    x = 26,703.47

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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.