Home / 21,200.04-31,800.21-6,408.74

Finding the Fourth Proportional to 21,200.04, 31,800.21 and 6,408.74

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Solution

The fourth proportional to 21,200.04, 31,800.21 and 6,408.74 is: 9,613.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,200.04 : 31,800.21 = 6,408.74 : x
  2. Step 2: Convert to fraction form
    21,200.04/31,800.21 = 6,408.74/x
  3. Step 3: Cross multiply
    21,200.04x = 31,800.21 × 6,408.74
  4. Step 4: Simplify right side
    21,200.04x = 203,799,118.83
  5. Step 5: Solve for x
    x = 203,799,118.83/21,200.04
  6. Step 6: Final answer
    x = 9,613.15

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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.