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Finding the Fourth Proportional to 28,200.60, 42,300.90 and 14,203.80

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Solution

The fourth proportional to 28,200.60, 42,300.90 and 14,203.80 is: 21,305.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,200.60 : 42,300.90 = 14,203.80 : x
  2. Step 2: Convert to fraction form
    28,200.60/42,300.90 = 14,203.80/x
  3. Step 3: Cross multiply
    28,200.60x = 42,300.90 × 14,203.80
  4. Step 4: Simplify right side
    28,200.60x = 600,833,523.42
  5. Step 5: Solve for x
    x = 600,833,523.42/28,200.60
  6. Step 6: Final answer
    x = 21,305.70

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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.