Home / 20,076.30-30,102.45-12,290.70

Finding the Fourth Proportional to 20,076.30, 30,102.45 and 12,290.70

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Solution

The fourth proportional to 20,076.30, 30,102.45 and 12,290.70 is: 18,428.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,076.30 : 30,102.45 = 12,290.70 : x
  2. Step 2: Convert to fraction form
    20,076.30/30,102.45 = 12,290.70/x
  3. Step 3: Cross multiply
    20,076.30x = 30,102.45 × 12,290.70
  4. Step 4: Simplify right side
    20,076.30x = 369,980,182.22
  5. Step 5: Solve for x
    x = 369,980,182.22/20,076.30
  6. Step 6: Final answer
    x = 18,428.70

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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.