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Finding the Fourth Proportional to 28,758, 42,960.08 and 20,792.46

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Solution

The fourth proportional to 28,758, 42,960.08 and 20,792.46 is: 31,060.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,758 : 42,960.08 = 20,792.46 : x
  2. Step 2: Convert to fraction form
    28,758/42,960.08 = 20,792.46/x
  3. Step 3: Cross multiply
    28,758x = 42,960.08 × 20,792.46
  4. Step 4: Simplify right side
    28,758x = 893,245,641.03
  5. Step 5: Solve for x
    x = 893,245,641.03/28,758
  6. Step 6: Final answer
    x = 31,060.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.