Home / 20,555.47-28,366.63-11,124.03

Finding the Fourth Proportional to 20,555.47, 28,366.63 and 11,124.03

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Solution

The fourth proportional to 20,555.47, 28,366.63 and 11,124.03 is: 15,351.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.47 : 28,366.63 = 11,124.03 : x
  2. Step 2: Convert to fraction form
    20,555.47/28,366.63 = 11,124.03/x
  3. Step 3: Cross multiply
    20,555.47x = 28,366.63 × 11,124.03
  4. Step 4: Simplify right side
    20,555.47x = 315,551,321.68
  5. Step 5: Solve for x
    x = 315,551,321.68/20,555.47
  6. Step 6: Final answer
    x = 15,351.21

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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.