Home / 28,051.03-42,078.86-20,190.13

Finding the Fourth Proportional to 28,051.03, 42,078.86 and 20,190.13

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Solution

The fourth proportional to 28,051.03, 42,078.86 and 20,190.13 is: 30,286.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,051.03 : 42,078.86 = 20,190.13 : x
  2. Step 2: Convert to fraction form
    28,051.03/42,078.86 = 20,190.13/x
  3. Step 3: Cross multiply
    28,051.03x = 42,078.86 × 20,190.13
  4. Step 4: Simplify right side
    28,051.03x = 849,577,552.70
  5. Step 5: Solve for x
    x = 849,577,552.70/28,051.03
  6. Step 6: Final answer
    x = 30,286.86

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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.