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Finding the Fourth Proportional to 21,922.92, 32,880.42 and 7,129.80

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Solution

The fourth proportional to 21,922.92, 32,880.42 and 7,129.80 is: 10,693.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,922.92 : 32,880.42 = 7,129.80 : x
  2. Step 2: Convert to fraction form
    21,922.92/32,880.42 = 7,129.80/x
  3. Step 3: Cross multiply
    21,922.92x = 32,880.42 × 7,129.80
  4. Step 4: Simplify right side
    21,922.92x = 234,430,818.52
  5. Step 5: Solve for x
    x = 234,430,818.52/21,922.92
  6. Step 6: Final answer
    x = 10,693.41

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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.