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Finding the Fourth Proportional to 21,551.20, 29,823.60 and 21,032.80

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Solution

The fourth proportional to 21,551.20, 29,823.60 and 21,032.80 is: 29,106.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,551.20 : 29,823.60 = 21,032.80 : x
  2. Step 2: Convert to fraction form
    21,551.20/29,823.60 = 21,032.80/x
  3. Step 3: Cross multiply
    21,551.20x = 29,823.60 × 21,032.80
  4. Step 4: Simplify right side
    21,551.20x = 627,273,814.08
  5. Step 5: Solve for x
    x = 627,273,814.08/21,551.20
  6. Step 6: Final answer
    x = 29,106.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.