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Finding the Fourth Proportional to 21,789.29, 32,683.94 and 15,228.29

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Solution

The fourth proportional to 21,789.29, 32,683.94 and 15,228.29 is: 22,842.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789.29 : 32,683.94 = 15,228.29 : x
  2. Step 2: Convert to fraction form
    21,789.29/32,683.94 = 15,228.29/x
  3. Step 3: Cross multiply
    21,789.29x = 32,683.94 × 15,228.29
  4. Step 4: Simplify right side
    21,789.29x = 497,720,277.10
  5. Step 5: Solve for x
    x = 497,720,277.10/21,789.29
  6. Step 6: Final answer
    x = 22,842.43

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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.