Home / 20,078.36-27,707.81-11,125.83

Finding the Fourth Proportional to 20,078.36, 27,707.81 and 11,125.83

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Solution

The fourth proportional to 20,078.36, 27,707.81 and 11,125.83 is: 15,353.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.36 : 27,707.81 = 11,125.83 : x
  2. Step 2: Convert to fraction form
    20,078.36/27,707.81 = 11,125.83/x
  3. Step 3: Cross multiply
    20,078.36x = 27,707.81 × 11,125.83
  4. Step 4: Simplify right side
    20,078.36x = 308,272,328.10
  5. Step 5: Solve for x
    x = 308,272,328.10/20,078.36
  6. Step 6: Final answer
    x = 15,353.47

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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.