Home / 20,308.96-28,016.40-12,751.52

Finding the Fourth Proportional to 20,308.96, 28,016.40 and 12,751.52

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Solution

The fourth proportional to 20,308.96, 28,016.40 and 12,751.52 is: 17,590.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,308.96 : 28,016.40 = 12,751.52 : x
  2. Step 2: Convert to fraction form
    20,308.96/28,016.40 = 12,751.52/x
  3. Step 3: Cross multiply
    20,308.96x = 28,016.40 × 12,751.52
  4. Step 4: Simplify right side
    20,308.96x = 357,251,684.93
  5. Step 5: Solve for x
    x = 357,251,684.93/20,308.96
  6. Step 6: Final answer
    x = 17,590.84

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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.