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Finding the Fourth Proportional to 10,659.78, 15,989.67 and 3,264.21

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Solution

The fourth proportional to 10,659.78, 15,989.67 and 3,264.21 is: 4,896.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,659.78 : 15,989.67 = 3,264.21 : x
  2. Step 2: Convert to fraction form
    10,659.78/15,989.67 = 3,264.21/x
  3. Step 3: Cross multiply
    10,659.78x = 15,989.67 × 3,264.21
  4. Step 4: Simplify right side
    10,659.78x = 52,193,640.71
  5. Step 5: Solve for x
    x = 52,193,640.71/10,659.78
  6. Step 6: Final answer
    x = 4,896.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.