Home / 20,856.96-28,783.32-11,425.52

Finding the Fourth Proportional to 20,856.96, 28,783.32 and 11,425.52

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Solution

The fourth proportional to 20,856.96, 28,783.32 and 11,425.52 is: 15,767.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.96 : 28,783.32 = 11,425.52 : x
  2. Step 2: Convert to fraction form
    20,856.96/28,783.32 = 11,425.52/x
  3. Step 3: Cross multiply
    20,856.96x = 28,783.32 × 11,425.52
  4. Step 4: Simplify right side
    20,856.96x = 328,864,269.24
  5. Step 5: Solve for x
    x = 328,864,269.24/20,856.96
  6. Step 6: Final answer
    x = 15,767.61

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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.