Home / 20,540.58-28,345.95-11,109.30

Finding the Fourth Proportional to 20,540.58, 28,345.95 and 11,109.30

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Solution

The fourth proportional to 20,540.58, 28,345.95 and 11,109.30 is: 15,330.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.58 : 28,345.95 = 11,109.30 : x
  2. Step 2: Convert to fraction form
    20,540.58/28,345.95 = 11,109.30/x
  3. Step 3: Cross multiply
    20,540.58x = 28,345.95 × 11,109.30
  4. Step 4: Simplify right side
    20,540.58x = 314,903,662.34
  5. Step 5: Solve for x
    x = 314,903,662.34/20,540.58
  6. Step 6: Final answer
    x = 15,330.81

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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.