Home / 20,515.40-28,311.62-12,023.63

Finding the Fourth Proportional to 20,515.40, 28,311.62 and 12,023.63

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Solution

The fourth proportional to 20,515.40, 28,311.62 and 12,023.63 is: 16,592.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.40 : 28,311.62 = 12,023.63 : x
  2. Step 2: Convert to fraction form
    20,515.40/28,311.62 = 12,023.63/x
  3. Step 3: Cross multiply
    20,515.40x = 28,311.62 × 12,023.63
  4. Step 4: Simplify right side
    20,515.40x = 340,408,241.90
  5. Step 5: Solve for x
    x = 340,408,241.90/20,515.40
  6. Step 6: Final answer
    x = 16,592.82

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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.