Home / 7,325.20-10,987.70-1,778.50

Finding the Fourth Proportional to 7,325.20, 10,987.70 and 1,778.50

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Solution

The fourth proportional to 7,325.20, 10,987.70 and 1,778.50 is: 2,667.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,325.20 : 10,987.70 = 1,778.50 : x
  2. Step 2: Convert to fraction form
    7,325.20/10,987.70 = 1,778.50/x
  3. Step 3: Cross multiply
    7,325.20x = 10,987.70 × 1,778.50
  4. Step 4: Simplify right side
    7,325.20x = 19,541,624.45
  5. Step 5: Solve for x
    x = 19,541,624.45/7,325.20
  6. Step 6: Final answer
    x = 2,667.73

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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.