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Finding the Fourth Proportional to 15,371.74, 21,213.07 and 8,657.48

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Solution

The fourth proportional to 15,371.74, 21,213.07 and 8,657.48 is: 11,947.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,371.74 : 21,213.07 = 8,657.48 : x
  2. Step 2: Convert to fraction form
    15,371.74/21,213.07 = 8,657.48/x
  3. Step 3: Cross multiply
    15,371.74x = 21,213.07 × 8,657.48
  4. Step 4: Simplify right side
    15,371.74x = 183,651,641.33
  5. Step 5: Solve for x
    x = 183,651,641.33/15,371.74
  6. Step 6: Final answer
    x = 11,947.36

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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.