Home / 20,407.86-28,162.96-11,455.47

Finding the Fourth Proportional to 20,407.86, 28,162.96 and 11,455.47

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Solution

The fourth proportional to 20,407.86, 28,162.96 and 11,455.47 is: 15,808.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.86 : 28,162.96 = 11,455.47 : x
  2. Step 2: Convert to fraction form
    20,407.86/28,162.96 = 11,455.47/x
  3. Step 3: Cross multiply
    20,407.86x = 28,162.96 × 11,455.47
  4. Step 4: Simplify right side
    20,407.86x = 322,619,914.75
  5. Step 5: Solve for x
    x = 322,619,914.75/20,407.86
  6. Step 6: Final answer
    x = 15,808.61

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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.