Home / 28,050.77-42,078.48-20,189.88

Finding the Fourth Proportional to 28,050.77, 42,078.48 and 20,189.88

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Solution

The fourth proportional to 28,050.77, 42,078.48 and 20,189.88 is: 30,286.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,050.77 : 42,078.48 = 20,189.88 : x
  2. Step 2: Convert to fraction form
    28,050.77/42,078.48 = 20,189.88/x
  3. Step 3: Cross multiply
    28,050.77x = 42,078.48 × 20,189.88
  4. Step 4: Simplify right side
    28,050.77x = 849,559,461.78
  5. Step 5: Solve for x
    x = 849,559,461.78/28,050.77
  6. Step 6: Final answer
    x = 30,286.49

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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.