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Finding the Fourth Proportional to 21,851.90, 32,777.86 and 5,435.90

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Solution

The fourth proportional to 21,851.90, 32,777.86 and 5,435.90 is: 8,153.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,851.90 : 32,777.86 = 5,435.90 : x
  2. Step 2: Convert to fraction form
    21,851.90/32,777.86 = 5,435.90/x
  3. Step 3: Cross multiply
    21,851.90x = 32,777.86 × 5,435.90
  4. Step 4: Simplify right side
    21,851.90x = 178,177,169.17
  5. Step 5: Solve for x
    x = 178,177,169.17/21,851.90
  6. Step 6: Final answer
    x = 8,153.85

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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.