Home / 20,134.90-27,788.36-11,521.88

Finding the Fourth Proportional to 20,134.90, 27,788.36 and 11,521.88

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Solution

The fourth proportional to 20,134.90, 27,788.36 and 11,521.88 is: 15,901.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,134.90 : 27,788.36 = 11,521.88 : x
  2. Step 2: Convert to fraction form
    20,134.90/27,788.36 = 11,521.88/x
  3. Step 3: Cross multiply
    20,134.90x = 27,788.36 × 11,521.88
  4. Step 4: Simplify right side
    20,134.90x = 320,173,981.57
  5. Step 5: Solve for x
    x = 320,173,981.57/20,134.90
  6. Step 6: Final answer
    x = 15,901.45

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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.