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Finding the Fourth Proportional to 28,200, 38,920.12 and 16,260.98

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Solution

The fourth proportional to 28,200, 38,920.12 and 16,260.98 is: 22,442.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,200 : 38,920.12 = 16,260.98 : x
  2. Step 2: Convert to fraction form
    28,200/38,920.12 = 16,260.98/x
  3. Step 3: Cross multiply
    28,200x = 38,920.12 × 16,260.98
  4. Step 4: Simplify right side
    28,200x = 632,879,292.92
  5. Step 5: Solve for x
    x = 632,879,292.92/28,200
  6. Step 6: Final answer
    x = 22,442.53

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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.