Home / 7,109.12-10,663.68-2,178.11

Finding the Fourth Proportional to 7,109.12, 10,663.68 and 2,178.11

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Solution

The fourth proportional to 7,109.12, 10,663.68 and 2,178.11 is: 3,267.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,109.12 : 10,663.68 = 2,178.11 : x
  2. Step 2: Convert to fraction form
    7,109.12/10,663.68 = 2,178.11/x
  3. Step 3: Cross multiply
    7,109.12x = 10,663.68 × 2,178.11
  4. Step 4: Simplify right side
    7,109.12x = 23,226,614.73
  5. Step 5: Solve for x
    x = 23,226,614.73/7,109.12
  6. Step 6: Final answer
    x = 3,267.16

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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.