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Finding the Fourth Proportional to 15,750.78, 21,736.26 and 8,677.32

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Solution

The fourth proportional to 15,750.78, 21,736.26 and 8,677.32 is: 11,974.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,750.78 : 21,736.26 = 8,677.32 : x
  2. Step 2: Convert to fraction form
    15,750.78/21,736.26 = 8,677.32/x
  3. Step 3: Cross multiply
    15,750.78x = 21,736.26 × 8,677.32
  4. Step 4: Simplify right side
    15,750.78x = 188,612,483.62
  5. Step 5: Solve for x
    x = 188,612,483.62/15,750.78
  6. Step 6: Final answer
    x = 11,974.80

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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.