Home / 15,697.80-21,649.68-11,213.28

Finding the Fourth Proportional to 15,697.80, 21,649.68 and 11,213.28

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Solution

The fourth proportional to 15,697.80, 21,649.68 and 11,213.28 is: 15,464.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,697.80 : 21,649.68 = 11,213.28 : x
  2. Step 2: Convert to fraction form
    15,697.80/21,649.68 = 11,213.28/x
  3. Step 3: Cross multiply
    15,697.80x = 21,649.68 × 11,213.28
  4. Step 4: Simplify right side
    15,697.80x = 242,763,923.75
  5. Step 5: Solve for x
    x = 242,763,923.75/15,697.80
  6. Step 6: Final answer
    x = 15,464.84

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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.