Home / 20,619.74-28,455.37-11,188.31

Finding the Fourth Proportional to 20,619.74, 28,455.37 and 11,188.31

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Solution

The fourth proportional to 20,619.74, 28,455.37 and 11,188.31 is: 15,439.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.74 : 28,455.37 = 11,188.31 : x
  2. Step 2: Convert to fraction form
    20,619.74/28,455.37 = 11,188.31/x
  3. Step 3: Cross multiply
    20,619.74x = 28,455.37 × 11,188.31
  4. Step 4: Simplify right side
    20,619.74x = 318,367,330.48
  5. Step 5: Solve for x
    x = 318,367,330.48/20,619.74
  6. Step 6: Final answer
    x = 15,439.93

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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.