Home / 20,822.36-28,734.86-11,390.92

Finding the Fourth Proportional to 20,822.36, 28,734.86 and 11,390.92

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Solution

The fourth proportional to 20,822.36, 28,734.86 and 11,390.92 is: 15,719.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.36 : 28,734.86 = 11,390.92 : x
  2. Step 2: Convert to fraction form
    20,822.36/28,734.86 = 11,390.92/x
  3. Step 3: Cross multiply
    20,822.36x = 28,734.86 × 11,390.92
  4. Step 4: Simplify right side
    20,822.36x = 327,316,448.11
  5. Step 5: Solve for x
    x = 327,316,448.11/20,822.36
  6. Step 6: Final answer
    x = 15,719.47

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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.