Home / 20,091.47-30,120.18-12,283.88

Finding the Fourth Proportional to 20,091.47, 30,120.18 and 12,283.88

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Solution

The fourth proportional to 20,091.47, 30,120.18 and 12,283.88 is: 18,415.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,091.47 : 30,120.18 = 12,283.88 : x
  2. Step 2: Convert to fraction form
    20,091.47/30,120.18 = 12,283.88/x
  3. Step 3: Cross multiply
    20,091.47x = 30,120.18 × 12,283.88
  4. Step 4: Simplify right side
    20,091.47x = 369,992,526.10
  5. Step 5: Solve for x
    x = 369,992,526.10/20,091.47
  6. Step 6: Final answer
    x = 18,415.41

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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.