Home / 15,811.90-21,819.84-9,098.56

Finding the Fourth Proportional to 15,811.90, 21,819.84 and 9,098.56

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Solution

The fourth proportional to 15,811.90, 21,819.84 and 9,098.56 is: 12,555.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.90 : 21,819.84 = 9,098.56 : x
  2. Step 2: Convert to fraction form
    15,811.90/21,819.84 = 9,098.56/x
  3. Step 3: Cross multiply
    15,811.90x = 21,819.84 × 9,098.56
  4. Step 4: Simplify right side
    15,811.90x = 198,529,123.43
  5. Step 5: Solve for x
    x = 198,529,123.43/15,811.90
  6. Step 6: Final answer
    x = 12,555.68

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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.