Home / 20,540.78-28,346.28-11,109.34

Finding the Fourth Proportional to 20,540.78, 28,346.28 and 11,109.34

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Solution

The fourth proportional to 20,540.78, 28,346.28 and 11,109.34 is: 15,330.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.78 : 28,346.28 = 11,109.34 : x
  2. Step 2: Convert to fraction form
    20,540.78/28,346.28 = 11,109.34/x
  3. Step 3: Cross multiply
    20,540.78x = 28,346.28 × 11,109.34
  4. Step 4: Simplify right side
    20,540.78x = 314,908,462.26
  5. Step 5: Solve for x
    x = 314,908,462.26/20,540.78
  6. Step 6: Final answer
    x = 15,330.89

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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.