Home / 28,405.46-39,207.51-19,909.83

Finding the Fourth Proportional to 28,405.46, 39,207.51 and 19,909.83

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Solution

The fourth proportional to 28,405.46, 39,207.51 and 19,909.83 is: 27,481.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.46 : 39,207.51 = 19,909.83 : x
  2. Step 2: Convert to fraction form
    28,405.46/39,207.51 = 19,909.83/x
  3. Step 3: Cross multiply
    28,405.46x = 39,207.51 × 19,909.83
  4. Step 4: Simplify right side
    28,405.46x = 780,615,005.85
  5. Step 5: Solve for x
    x = 780,615,005.85/28,405.46
  6. Step 6: Final answer
    x = 27,481.16

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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.