Home / 20,212.02-30,321.40-9,118.46

Finding the Fourth Proportional to 20,212.02, 30,321.40 and 9,118.46

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Solution

The fourth proportional to 20,212.02, 30,321.40 and 9,118.46 is: 13,679.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,212.02 : 30,321.40 = 9,118.46 : x
  2. Step 2: Convert to fraction form
    20,212.02/30,321.40 = 9,118.46/x
  3. Step 3: Cross multiply
    20,212.02x = 30,321.40 × 9,118.46
  4. Step 4: Simplify right side
    20,212.02x = 276,484,473.04
  5. Step 5: Solve for x
    x = 276,484,473.04/20,212.02
  6. Step 6: Final answer
    x = 13,679.21

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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.