Home / 20,272.08-30,408.12-6,420

Finding the Fourth Proportional to 20,272.08, 30,408.12 and 6,420

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Solution

The fourth proportional to 20,272.08, 30,408.12 and 6,420 is: 9,630

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.08 : 30,408.12 = 6,420 : x
  2. Step 2: Convert to fraction form
    20,272.08/30,408.12 = 6,420/x
  3. Step 3: Cross multiply
    20,272.08x = 30,408.12 × 6,420
  4. Step 4: Simplify right side
    20,272.08x = 195,220,130.40
  5. Step 5: Solve for x
    x = 195,220,130.40/20,272.08
  6. Step 6: Final answer
    x = 9,630

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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.