Home / 20,076.60-30,187.80-19,639.20

Finding the Fourth Proportional to 20,076.60, 30,187.80 and 19,639.20

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Solution

The fourth proportional to 20,076.60, 30,187.80 and 19,639.20 is: 29,530.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,076.60 : 30,187.80 = 19,639.20 : x
  2. Step 2: Convert to fraction form
    20,076.60/30,187.80 = 19,639.20/x
  3. Step 3: Cross multiply
    20,076.60x = 30,187.80 × 19,639.20
  4. Step 4: Simplify right side
    20,076.60x = 592,864,241.76
  5. Step 5: Solve for x
    x = 592,864,241.76/20,076.60
  6. Step 6: Final answer
    x = 29,530.11

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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.