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Finding the Fourth Proportional to 21,923.16, 32,877.68 and 7,128.48

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Solution

The fourth proportional to 21,923.16, 32,877.68 and 7,128.48 is: 10,690.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,923.16 : 32,877.68 = 7,128.48 : x
  2. Step 2: Convert to fraction form
    21,923.16/32,877.68 = 7,128.48/x
  3. Step 3: Cross multiply
    21,923.16x = 32,877.68 × 7,128.48
  4. Step 4: Simplify right side
    21,923.16x = 234,367,884.33
  5. Step 5: Solve for x
    x = 234,367,884.33/21,923.16
  6. Step 6: Final answer
    x = 10,690.42

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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.