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Finding the Fourth Proportional to 15,795.48, 21,797.48 and 8,721.75

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Solution

The fourth proportional to 15,795.48, 21,797.48 and 8,721.75 is: 12,035.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,795.48 : 21,797.48 = 8,721.75 : x
  2. Step 2: Convert to fraction form
    15,795.48/21,797.48 = 8,721.75/x
  3. Step 3: Cross multiply
    15,795.48x = 21,797.48 × 8,721.75
  4. Step 4: Simplify right side
    15,795.48x = 190,112,127.58
  5. Step 5: Solve for x
    x = 190,112,127.58/15,795.48
  6. Step 6: Final answer
    x = 12,035.86

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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.