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Finding the Fourth Proportional to 21,609.92, 32,407.38 and 7,569.64

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Solution

The fourth proportional to 21,609.92, 32,407.38 and 7,569.64 is: 11,351.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,609.92 : 32,407.38 = 7,569.64 : x
  2. Step 2: Convert to fraction form
    21,609.92/32,407.38 = 7,569.64/x
  3. Step 3: Cross multiply
    21,609.92x = 32,407.38 × 7,569.64
  4. Step 4: Simplify right side
    21,609.92x = 245,312,199.94
  5. Step 5: Solve for x
    x = 245,312,199.94/21,609.92
  6. Step 6: Final answer
    x = 11,351.83

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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.