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Finding the Fourth Proportional to 21,970.81, 32,961.41 and 7,179.69

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Solution

The fourth proportional to 21,970.81, 32,961.41 and 7,179.69 is: 10,771.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,970.81 : 32,961.41 = 7,179.69 : x
  2. Step 2: Convert to fraction form
    21,970.81/32,961.41 = 7,179.69/x
  3. Step 3: Cross multiply
    21,970.81x = 32,961.41 × 7,179.69
  4. Step 4: Simplify right side
    21,970.81x = 236,652,705.76
  5. Step 5: Solve for x
    x = 236,652,705.76/21,970.81
  6. Step 6: Final answer
    x = 10,771.23

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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.