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Finding the Fourth Proportional to 28,472.82, 42,709.15 and 7,696.32

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Solution

The fourth proportional to 28,472.82, 42,709.15 and 7,696.32 is: 11,544.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,472.82 : 42,709.15 = 7,696.32 : x
  2. Step 2: Convert to fraction form
    28,472.82/42,709.15 = 7,696.32/x
  3. Step 3: Cross multiply
    28,472.82x = 42,709.15 × 7,696.32
  4. Step 4: Simplify right side
    28,472.82x = 328,703,285.33
  5. Step 5: Solve for x
    x = 328,703,285.33/28,472.82
  6. Step 6: Final answer
    x = 11,544.46

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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.