Home / 20,659.12-28,509.66-11,227.60

Finding the Fourth Proportional to 20,659.12, 28,509.66 and 11,227.60

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Solution

The fourth proportional to 20,659.12, 28,509.66 and 11,227.60 is: 15,494.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.12 : 28,509.66 = 11,227.60 : x
  2. Step 2: Convert to fraction form
    20,659.12/28,509.66 = 11,227.60/x
  3. Step 3: Cross multiply
    20,659.12x = 28,509.66 × 11,227.60
  4. Step 4: Simplify right side
    20,659.12x = 320,095,058.62
  5. Step 5: Solve for x
    x = 320,095,058.62/20,659.12
  6. Step 6: Final answer
    x = 15,494.13

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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.