Home / 20,130.80-30,160.20-9,719.60

Finding the Fourth Proportional to 20,130.80, 30,160.20 and 9,719.60

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Solution

The fourth proportional to 20,130.80, 30,160.20 and 9,719.60 is: 14,562.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.80 : 30,160.20 = 9,719.60 : x
  2. Step 2: Convert to fraction form
    20,130.80/30,160.20 = 9,719.60/x
  3. Step 3: Cross multiply
    20,130.80x = 30,160.20 × 9,719.60
  4. Step 4: Simplify right side
    20,130.80x = 293,145,079.92
  5. Step 5: Solve for x
    x = 293,145,079.92/20,130.80
  6. Step 6: Final answer
    x = 14,562.02

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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.