Home / 20,408.20-30,612.30-14,187.40

Finding the Fourth Proportional to 20,408.20, 30,612.30 and 14,187.40

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Solution

The fourth proportional to 20,408.20, 30,612.30 and 14,187.40 is: 21,281.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.20 : 30,612.30 = 14,187.40 : x
  2. Step 2: Convert to fraction form
    20,408.20/30,612.30 = 14,187.40/x
  3. Step 3: Cross multiply
    20,408.20x = 30,612.30 × 14,187.40
  4. Step 4: Simplify right side
    20,408.20x = 434,308,945.02
  5. Step 5: Solve for x
    x = 434,308,945.02/20,408.20
  6. Step 6: Final answer
    x = 21,281.10

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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.