Home / 20,555.66-28,366.76-11,124.23

Finding the Fourth Proportional to 20,555.66, 28,366.76 and 11,124.23

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Solution

The fourth proportional to 20,555.66, 28,366.76 and 11,124.23 is: 15,351.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.66 : 28,366.76 = 11,124.23 : x
  2. Step 2: Convert to fraction form
    20,555.66/28,366.76 = 11,124.23/x
  3. Step 3: Cross multiply
    20,555.66x = 28,366.76 × 11,124.23
  4. Step 4: Simplify right side
    20,555.66x = 315,558,362.59
  5. Step 5: Solve for x
    x = 315,558,362.59/20,555.66
  6. Step 6: Final answer
    x = 15,351.41

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Half scale
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Double scale
Find fourth proportional to 20,556.66, 28,368.14 and 11,125.23
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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.