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Finding the Fourth Proportional to 7,118.55, 9,819.45 and 4,283.96

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Solution

The fourth proportional to 7,118.55, 9,819.45 and 4,283.96 is: 5,909.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,118.55 : 9,819.45 = 4,283.96 : x
  2. Step 2: Convert to fraction form
    7,118.55/9,819.45 = 4,283.96/x
  3. Step 3: Cross multiply
    7,118.55x = 9,819.45 × 4,283.96
  4. Step 4: Simplify right side
    7,118.55x = 42,066,081.92
  5. Step 5: Solve for x
    x = 42,066,081.92/7,118.55
  6. Step 6: Final answer
    x = 5,909.36

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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.