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Finding the Fourth Proportional to 21,996.70, 32,995.05 and 21,219.10

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Solution

The fourth proportional to 21,996.70, 32,995.05 and 21,219.10 is: 31,828.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,996.70 : 32,995.05 = 21,219.10 : x
  2. Step 2: Convert to fraction form
    21,996.70/32,995.05 = 21,219.10/x
  3. Step 3: Cross multiply
    21,996.70x = 32,995.05 × 21,219.10
  4. Step 4: Simplify right side
    21,996.70x = 700,125,265.46
  5. Step 5: Solve for x
    x = 700,125,265.46/21,996.70
  6. Step 6: Final answer
    x = 31,828.65

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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.