Home / 7,424.72-11,139.48-6,394.40

Finding the Fourth Proportional to 7,424.72, 11,139.48 and 6,394.40

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Solution

The fourth proportional to 7,424.72, 11,139.48 and 6,394.40 is: 9,593.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,424.72 : 11,139.48 = 6,394.40 : x
  2. Step 2: Convert to fraction form
    7,424.72/11,139.48 = 6,394.40/x
  3. Step 3: Cross multiply
    7,424.72x = 11,139.48 × 6,394.40
  4. Step 4: Simplify right side
    7,424.72x = 71,230,290.91
  5. Step 5: Solve for x
    x = 71,230,290.91/7,424.72
  6. Step 6: Final answer
    x = 9,593.67

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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.