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Finding the Fourth Proportional to 15,362.76, 21,201.66 and 8,649

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Solution

The fourth proportional to 15,362.76, 21,201.66 and 8,649 is: 11,936.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,362.76 : 21,201.66 = 8,649 : x
  2. Step 2: Convert to fraction form
    15,362.76/21,201.66 = 8,649/x
  3. Step 3: Cross multiply
    15,362.76x = 21,201.66 × 8,649
  4. Step 4: Simplify right side
    15,362.76x = 183,373,157.34
  5. Step 5: Solve for x
    x = 183,373,157.34/15,362.76
  6. Step 6: Final answer
    x = 11,936.21

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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.