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Finding the Fourth Proportional to 21,996.80, 32,922.30 and 15,435.80

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Solution

The fourth proportional to 21,996.80, 32,922.30 and 15,435.80 is: 23,102.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,996.80 : 32,922.30 = 15,435.80 : x
  2. Step 2: Convert to fraction form
    21,996.80/32,922.30 = 15,435.80/x
  3. Step 3: Cross multiply
    21,996.80x = 32,922.30 × 15,435.80
  4. Step 4: Simplify right side
    21,996.80x = 508,182,038.34
  5. Step 5: Solve for x
    x = 508,182,038.34/21,996.80
  6. Step 6: Final answer
    x = 23,102.54

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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.