Home / 15,398.72-21,238.14-11,150.42

Finding the Fourth Proportional to 15,398.72, 21,238.14 and 11,150.42

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Solution

The fourth proportional to 15,398.72, 21,238.14 and 11,150.42 is: 15,378.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,398.72 : 21,238.14 = 11,150.42 : x
  2. Step 2: Convert to fraction form
    15,398.72/21,238.14 = 11,150.42/x
  3. Step 3: Cross multiply
    15,398.72x = 21,238.14 × 11,150.42
  4. Step 4: Simplify right side
    15,398.72x = 236,814,181.02
  5. Step 5: Solve for x
    x = 236,814,181.02/15,398.72
  6. Step 6: Final answer
    x = 15,378.82

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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.