Home / 15,188.72-20,949.11-11,154.28

Finding the Fourth Proportional to 15,188.72, 20,949.11 and 11,154.28

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Solution

The fourth proportional to 15,188.72, 20,949.11 and 11,154.28 is: 15,384.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,188.72 : 20,949.11 = 11,154.28 : x
  2. Step 2: Convert to fraction form
    15,188.72/20,949.11 = 11,154.28/x
  3. Step 3: Cross multiply
    15,188.72x = 20,949.11 × 11,154.28
  4. Step 4: Simplify right side
    15,188.72x = 233,672,238.69
  5. Step 5: Solve for x
    x = 233,672,238.69/15,188.72
  6. Step 6: Final answer
    x = 15,384.59

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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.