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Finding the Fourth Proportional to 21,921.30, 32,873.85 and 7,130.70

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Solution

The fourth proportional to 21,921.30, 32,873.85 and 7,130.70 is: 10,693.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.30 : 32,873.85 = 7,130.70 : x
  2. Step 2: Convert to fraction form
    21,921.30/32,873.85 = 7,130.70/x
  3. Step 3: Cross multiply
    21,921.30x = 32,873.85 × 7,130.70
  4. Step 4: Simplify right side
    21,921.30x = 234,413,562.20
  5. Step 5: Solve for x
    x = 234,413,562.20/21,921.30
  6. Step 6: Final answer
    x = 10,693.42

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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.