Home / 20,030.64-27,642.75-11,078.31

Finding the Fourth Proportional to 20,030.64, 27,642.75 and 11,078.31

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Solution

The fourth proportional to 20,030.64, 27,642.75 and 11,078.31 is: 15,288.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,030.64 : 27,642.75 = 11,078.31 : x
  2. Step 2: Convert to fraction form
    20,030.64/27,642.75 = 11,078.31/x
  3. Step 3: Cross multiply
    20,030.64x = 27,642.75 × 11,078.31
  4. Step 4: Simplify right side
    20,030.64x = 306,234,953.75
  5. Step 5: Solve for x
    x = 306,234,953.75/20,030.64
  6. Step 6: Final answer
    x = 15,288.33

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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.