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Finding the Fourth Proportional to 21,813.52, 30,103.02 and 21,059.20

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Solution

The fourth proportional to 21,813.52, 30,103.02 and 21,059.20 is: 29,062.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,813.52 : 30,103.02 = 21,059.20 : x
  2. Step 2: Convert to fraction form
    21,813.52/30,103.02 = 21,059.20/x
  3. Step 3: Cross multiply
    21,813.52x = 30,103.02 × 21,059.20
  4. Step 4: Simplify right side
    21,813.52x = 633,945,518.78
  5. Step 5: Solve for x
    x = 633,945,518.78/21,813.52
  6. Step 6: Final answer
    x = 29,062.05

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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.