Home / 20,518.34-28,315.26-11,086.88

Finding the Fourth Proportional to 20,518.34, 28,315.26 and 11,086.88

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Solution

The fourth proportional to 20,518.34, 28,315.26 and 11,086.88 is: 15,299.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.34 : 28,315.26 = 11,086.88 : x
  2. Step 2: Convert to fraction form
    20,518.34/28,315.26 = 11,086.88/x
  3. Step 3: Cross multiply
    20,518.34x = 28,315.26 × 11,086.88
  4. Step 4: Simplify right side
    20,518.34x = 313,927,748.21
  5. Step 5: Solve for x
    x = 313,927,748.21/20,518.34
  6. Step 6: Final answer
    x = 15,299.86

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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.