Home / 20,425.86-28,188.78-12,465.75

Finding the Fourth Proportional to 20,425.86, 28,188.78 and 12,465.75

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Solution

The fourth proportional to 20,425.86, 28,188.78 and 12,465.75 is: 17,203.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.86 : 28,188.78 = 12,465.75 : x
  2. Step 2: Convert to fraction form
    20,425.86/28,188.78 = 12,465.75/x
  3. Step 3: Cross multiply
    20,425.86x = 28,188.78 × 12,465.75
  4. Step 4: Simplify right side
    20,425.86x = 351,394,284.29
  5. Step 5: Solve for x
    x = 351,394,284.29/20,425.86
  6. Step 6: Final answer
    x = 17,203.40

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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.