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Finding the Fourth Proportional to 28,151.80, 42,201.30 and 10,633.40

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Solution

The fourth proportional to 28,151.80, 42,201.30 and 10,633.40 is: 15,940.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,151.80 : 42,201.30 = 10,633.40 : x
  2. Step 2: Convert to fraction form
    28,151.80/42,201.30 = 10,633.40/x
  3. Step 3: Cross multiply
    28,151.80x = 42,201.30 × 10,633.40
  4. Step 4: Simplify right side
    28,151.80x = 448,743,303.42
  5. Step 5: Solve for x
    x = 448,743,303.42/28,151.80
  6. Step 6: Final answer
    x = 15,940.13

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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.