Home / 20,408.13-28,168.22-12,457.02

Finding the Fourth Proportional to 20,408.13, 28,168.22 and 12,457.02

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Solution

The fourth proportional to 20,408.13, 28,168.22 and 12,457.02 is: 17,193.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.13 : 28,168.22 = 12,457.02 : x
  2. Step 2: Convert to fraction form
    20,408.13/28,168.22 = 12,457.02/x
  3. Step 3: Cross multiply
    20,408.13x = 28,168.22 × 12,457.02
  4. Step 4: Simplify right side
    20,408.13x = 350,891,926.46
  5. Step 5: Solve for x
    x = 350,891,926.46/20,408.13
  6. Step 6: Final answer
    x = 17,193.73

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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.