Home / 20,030.76-27,640.86-11,078.28

Finding the Fourth Proportional to 20,030.76, 27,640.86 and 11,078.28

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Solution

The fourth proportional to 20,030.76, 27,640.86 and 11,078.28 is: 15,287.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,030.76 : 27,640.86 = 11,078.28 : x
  2. Step 2: Convert to fraction form
    20,030.76/27,640.86 = 11,078.28/x
  3. Step 3: Cross multiply
    20,030.76x = 27,640.86 × 11,078.28
  4. Step 4: Simplify right side
    20,030.76x = 306,213,186.52
  5. Step 5: Solve for x
    x = 306,213,186.52/20,030.76
  6. Step 6: Final answer
    x = 15,287.15

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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.