Home / 9,187.12-13,780.68-2,947.78

Finding the Fourth Proportional to 9,187.12, 13,780.68 and 2,947.78

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Solution

The fourth proportional to 9,187.12, 13,780.68 and 2,947.78 is: 4,421.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,187.12 : 13,780.68 = 2,947.78 : x
  2. Step 2: Convert to fraction form
    9,187.12/13,780.68 = 2,947.78/x
  3. Step 3: Cross multiply
    9,187.12x = 13,780.68 × 2,947.78
  4. Step 4: Simplify right side
    9,187.12x = 40,622,412.89
  5. Step 5: Solve for x
    x = 40,622,412.89/9,187.12
  6. Step 6: Final answer
    x = 4,421.67

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Similar ratio
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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.