Home / 11,697.12-16,145.28-7,221.60

Finding the Fourth Proportional to 11,697.12, 16,145.28 and 7,221.60

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Solution

The fourth proportional to 11,697.12, 16,145.28 and 7,221.60 is: 9,967.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,697.12 : 16,145.28 = 7,221.60 : x
  2. Step 2: Convert to fraction form
    11,697.12/16,145.28 = 7,221.60/x
  3. Step 3: Cross multiply
    11,697.12x = 16,145.28 × 7,221.60
  4. Step 4: Simplify right side
    11,697.12x = 116,594,754.05
  5. Step 5: Solve for x
    x = 116,594,754.05/11,697.12
  6. Step 6: Final answer
    x = 9,967.82

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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.