Home / 20,816.45-28,726.74-11,384.94

Finding the Fourth Proportional to 20,816.45, 28,726.74 and 11,384.94

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Solution

The fourth proportional to 20,816.45, 28,726.74 and 11,384.94 is: 15,711.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.45 : 28,726.74 = 11,384.94 : x
  2. Step 2: Convert to fraction form
    20,816.45/28,726.74 = 11,384.94/x
  3. Step 3: Cross multiply
    20,816.45x = 28,726.74 × 11,384.94
  4. Step 4: Simplify right side
    20,816.45x = 327,052,211.30
  5. Step 5: Solve for x
    x = 327,052,211.30/20,816.45
  6. Step 6: Final answer
    x = 15,711.24

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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.