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Finding the Fourth Proportional to 15,753.75, 21,740.26 and 8,583.75

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Solution

The fourth proportional to 15,753.75, 21,740.26 and 8,583.75 is: 11,845.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,753.75 : 21,740.26 = 8,583.75 : x
  2. Step 2: Convert to fraction form
    15,753.75/21,740.26 = 8,583.75/x
  3. Step 3: Cross multiply
    15,753.75x = 21,740.26 × 8,583.75
  4. Step 4: Simplify right side
    15,753.75x = 186,612,902.34
  5. Step 5: Solve for x
    x = 186,612,902.34/15,753.75
  6. Step 6: Final answer
    x = 11,845.62

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1.5x scale

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.