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Finding the Fourth Proportional to 7,118.90, 9,819.50 and 4,324.40

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Solution

The fourth proportional to 7,118.90, 9,819.50 and 4,324.40 is: 5,964.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,118.90 : 9,819.50 = 4,324.40 : x
  2. Step 2: Convert to fraction form
    7,118.90/9,819.50 = 4,324.40/x
  3. Step 3: Cross multiply
    7,118.90x = 9,819.50 × 4,324.40
  4. Step 4: Simplify right side
    7,118.90x = 42,463,445.80
  5. Step 5: Solve for x
    x = 42,463,445.80/7,118.90
  6. Step 6: Final answer
    x = 5,964.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.