Home / 13,686.87-20,521.08-11,057.61

Finding the Fourth Proportional to 13,686.87, 20,521.08 and 11,057.61

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Solution

The fourth proportional to 13,686.87, 20,521.08 and 11,057.61 is: 16,578.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.87 : 20,521.08 = 11,057.61 : x
  2. Step 2: Convert to fraction form
    13,686.87/20,521.08 = 11,057.61/x
  3. Step 3: Cross multiply
    13,686.87x = 20,521.08 × 11,057.61
  4. Step 4: Simplify right side
    13,686.87x = 226,914,099.42
  5. Step 5: Solve for x
    x = 226,914,099.42/13,686.87
  6. Step 6: Final answer
    x = 16,578.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.