Home / 15,221.53-21,005.62-8,507.17

Finding the Fourth Proportional to 15,221.53, 21,005.62 and 8,507.17

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Solution

The fourth proportional to 15,221.53, 21,005.62 and 8,507.17 is: 11,739.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.53 : 21,005.62 = 8,507.17 : x
  2. Step 2: Convert to fraction form
    15,221.53/21,005.62 = 8,507.17/x
  3. Step 3: Cross multiply
    15,221.53x = 21,005.62 × 8,507.17
  4. Step 4: Simplify right side
    15,221.53x = 178,698,380.30
  5. Step 5: Solve for x
    x = 178,698,380.30/15,221.53
  6. Step 6: Final answer
    x = 11,739.84

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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.