Home / 20,555.95-28,367.21-11,124.51

Finding the Fourth Proportional to 20,555.95, 28,367.21 and 11,124.51

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Solution

The fourth proportional to 20,555.95, 28,367.21 and 11,124.51 is: 15,351.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.95 : 28,367.21 = 11,124.51 : x
  2. Step 2: Convert to fraction form
    20,555.95/28,367.21 = 11,124.51/x
  3. Step 3: Cross multiply
    20,555.95x = 28,367.21 × 11,124.51
  4. Step 4: Simplify right side
    20,555.95x = 315,571,311.32
  5. Step 5: Solve for x
    x = 315,571,311.32/20,555.95
  6. Step 6: Final answer
    x = 15,351.82

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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.