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Finding the Fourth Proportional to 28,171.80, 42,184.80 and 22,291.20

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Solution

The fourth proportional to 28,171.80, 42,184.80 and 22,291.20 is: 33,379.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,171.80 : 42,184.80 = 22,291.20 : x
  2. Step 2: Convert to fraction form
    28,171.80/42,184.80 = 22,291.20/x
  3. Step 3: Cross multiply
    28,171.80x = 42,184.80 × 22,291.20
  4. Step 4: Simplify right side
    28,171.80x = 940,349,813.76
  5. Step 5: Solve for x
    x = 940,349,813.76/28,171.80
  6. Step 6: Final answer
    x = 33,379.12

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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.