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Finding the Fourth Proportional to 21,759, 32,474.10 and 19,659.48

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Solution

The fourth proportional to 21,759, 32,474.10 and 19,659.48 is: 29,340.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,759 : 32,474.10 = 19,659.48 : x
  2. Step 2: Convert to fraction form
    21,759/32,474.10 = 19,659.48/x
  3. Step 3: Cross multiply
    21,759x = 32,474.10 × 19,659.48
  4. Step 4: Simplify right side
    21,759x = 638,423,919.47
  5. Step 5: Solve for x
    x = 638,423,919.47/21,759
  6. Step 6: Final answer
    x = 29,340.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.