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Finding the Fourth Proportional to 28,922.40, 43,367.40 and 12,279.60

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Solution

The fourth proportional to 28,922.40, 43,367.40 and 12,279.60 is: 18,412.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,922.40 : 43,367.40 = 12,279.60 : x
  2. Step 2: Convert to fraction form
    28,922.40/43,367.40 = 12,279.60/x
  3. Step 3: Cross multiply
    28,922.40x = 43,367.40 × 12,279.60
  4. Step 4: Simplify right side
    28,922.40x = 532,534,325.04
  5. Step 5: Solve for x
    x = 532,534,325.04/28,922.40
  6. Step 6: Final answer
    x = 18,412.52

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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.