Home / 18,785.27-28,189.36-9,780.30

Finding the Fourth Proportional to 18,785.27, 28,189.36 and 9,780.30

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Solution

The fourth proportional to 18,785.27, 28,189.36 and 9,780.30 is: 14,676.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.27 : 28,189.36 = 9,780.30 : x
  2. Step 2: Convert to fraction form
    18,785.27/28,189.36 = 9,780.30/x
  3. Step 3: Cross multiply
    18,785.27x = 28,189.36 × 9,780.30
  4. Step 4: Simplify right side
    18,785.27x = 275,700,373.16
  5. Step 5: Solve for x
    x = 275,700,373.16/18,785.27
  6. Step 6: Final answer
    x = 14,676.41

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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.