Home / 19,121.67-28,665.45-7,432.20

Finding the Fourth Proportional to 19,121.67, 28,665.45 and 7,432.20

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Solution

The fourth proportional to 19,121.67, 28,665.45 and 7,432.20 is: 11,141.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,121.67 : 28,665.45 = 7,432.20 : x
  2. Step 2: Convert to fraction form
    19,121.67/28,665.45 = 7,432.20/x
  3. Step 3: Cross multiply
    19,121.67x = 28,665.45 × 7,432.20
  4. Step 4: Simplify right side
    19,121.67x = 213,047,357.49
  5. Step 5: Solve for x
    x = 213,047,357.49/19,121.67
  6. Step 6: Final answer
    x = 11,141.67

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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.