Home / 20,540.50-28,345.90-11,109.06

Finding the Fourth Proportional to 20,540.50, 28,345.90 and 11,109.06

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Solution

The fourth proportional to 20,540.50, 28,345.90 and 11,109.06 is: 15,330.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.50 : 28,345.90 = 11,109.06 : x
  2. Step 2: Convert to fraction form
    20,540.50/28,345.90 = 11,109.06/x
  3. Step 3: Cross multiply
    20,540.50x = 28,345.90 × 11,109.06
  4. Step 4: Simplify right side
    20,540.50x = 314,896,303.85
  5. Step 5: Solve for x
    x = 314,896,303.85/20,540.50
  6. Step 6: Final answer
    x = 15,330.51

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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.