Home / 20,867.40-28,796.85-11,435.94

Finding the Fourth Proportional to 20,867.40, 28,796.85 and 11,435.94

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Solution

The fourth proportional to 20,867.40, 28,796.85 and 11,435.94 is: 15,781.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.40 : 28,796.85 = 11,435.94 : x
  2. Step 2: Convert to fraction form
    20,867.40/28,796.85 = 11,435.94/x
  3. Step 3: Cross multiply
    20,867.40x = 28,796.85 × 11,435.94
  4. Step 4: Simplify right side
    20,867.40x = 329,319,048.79
  5. Step 5: Solve for x
    x = 329,319,048.79/20,867.40
  6. Step 6: Final answer
    x = 15,781.51

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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.