Home / 20,555.74-28,366.94-11,124.30

Finding the Fourth Proportional to 20,555.74, 28,366.94 and 11,124.30

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Solution

The fourth proportional to 20,555.74, 28,366.94 and 11,124.30 is: 15,351.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.74 : 28,366.94 = 11,124.30 : x
  2. Step 2: Convert to fraction form
    20,555.74/28,366.94 = 11,124.30/x
  3. Step 3: Cross multiply
    20,555.74x = 28,366.94 × 11,124.30
  4. Step 4: Simplify right side
    20,555.74x = 315,562,484.83
  5. Step 5: Solve for x
    x = 315,562,484.83/20,555.74
  6. Step 6: Final answer
    x = 15,351.55

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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.