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Finding the Fourth Proportional to 28,212.30, 42,311.70 and 16,340.40

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Solution

The fourth proportional to 28,212.30, 42,311.70 and 16,340.40 is: 24,506.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,212.30 : 42,311.70 = 16,340.40 : x
  2. Step 2: Convert to fraction form
    28,212.30/42,311.70 = 16,340.40/x
  3. Step 3: Cross multiply
    28,212.30x = 42,311.70 × 16,340.40
  4. Step 4: Simplify right side
    28,212.30x = 691,390,102.68
  5. Step 5: Solve for x
    x = 691,390,102.68/28,212.30
  6. Step 6: Final answer
    x = 24,506.69

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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.