Home / 20,518.31-28,314.86-11,565.64

Finding the Fourth Proportional to 20,518.31, 28,314.86 and 11,565.64

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Solution

The fourth proportional to 20,518.31, 28,314.86 and 11,565.64 is: 15,960.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.31 : 28,314.86 = 11,565.64 : x
  2. Step 2: Convert to fraction form
    20,518.31/28,314.86 = 11,565.64/x
  3. Step 3: Cross multiply
    20,518.31x = 28,314.86 × 11,565.64
  4. Step 4: Simplify right side
    20,518.31x = 327,479,435.54
  5. Step 5: Solve for x
    x = 327,479,435.54/20,518.31
  6. Step 6: Final answer
    x = 15,960.36

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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.