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Finding the Fourth Proportional to 15,751.40, 21,736.98 and 8,677.64

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Solution

The fourth proportional to 15,751.40, 21,736.98 and 8,677.64 is: 11,975.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,751.40 : 21,736.98 = 8,677.64 : x
  2. Step 2: Convert to fraction form
    15,751.40/21,736.98 = 8,677.64/x
  3. Step 3: Cross multiply
    15,751.40x = 21,736.98 × 8,677.64
  4. Step 4: Simplify right side
    15,751.40x = 188,625,687.13
  5. Step 5: Solve for x
    x = 188,625,687.13/15,751.40
  6. Step 6: Final answer
    x = 11,975.17

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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.