Home / 20,109.70-30,168.15-8,424.10

Finding the Fourth Proportional to 20,109.70, 30,168.15 and 8,424.10

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Solution

The fourth proportional to 20,109.70, 30,168.15 and 8,424.10 is: 12,637.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.70 : 30,168.15 = 8,424.10 : x
  2. Step 2: Convert to fraction form
    20,109.70/30,168.15 = 8,424.10/x
  3. Step 3: Cross multiply
    20,109.70x = 30,168.15 × 8,424.10
  4. Step 4: Simplify right side
    20,109.70x = 254,139,512.42
  5. Step 5: Solve for x
    x = 254,139,512.42/20,109.70
  6. Step 6: Final answer
    x = 12,637.66

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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.