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Finding the Fourth Proportional to 15,744.76, 21,727.76 and 8,671.16

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Solution

The fourth proportional to 15,744.76, 21,727.76 and 8,671.16 is: 11,966.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,744.76 : 21,727.76 = 8,671.16 : x
  2. Step 2: Convert to fraction form
    15,744.76/21,727.76 = 8,671.16/x
  3. Step 3: Cross multiply
    15,744.76x = 21,727.76 × 8,671.16
  4. Step 4: Simplify right side
    15,744.76x = 188,404,883.40
  5. Step 5: Solve for x
    x = 188,404,883.40/15,744.76
  6. Step 6: Final answer
    x = 11,966.20

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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.