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Finding the Fourth Proportional to 21,772.60, 32,673.45 and 7,921.60

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Solution

The fourth proportional to 21,772.60, 32,673.45 and 7,921.60 is: 11,887.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,772.60 : 32,673.45 = 7,921.60 : x
  2. Step 2: Convert to fraction form
    21,772.60/32,673.45 = 7,921.60/x
  3. Step 3: Cross multiply
    21,772.60x = 32,673.45 × 7,921.60
  4. Step 4: Simplify right side
    21,772.60x = 258,826,001.52
  5. Step 5: Solve for x
    x = 258,826,001.52/21,772.60
  6. Step 6: Final answer
    x = 11,887.69

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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.