Home / 20,856.74-28,784.82-11,782.48

Finding the Fourth Proportional to 20,856.74, 28,784.82 and 11,782.48

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Solution

The fourth proportional to 20,856.74, 28,784.82 and 11,782.48 is: 16,261.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.74 : 28,784.82 = 11,782.48 : x
  2. Step 2: Convert to fraction form
    20,856.74/28,784.82 = 11,782.48/x
  3. Step 3: Cross multiply
    20,856.74x = 28,784.82 × 11,782.48
  4. Step 4: Simplify right side
    20,856.74x = 339,156,493.99
  5. Step 5: Solve for x
    x = 339,156,493.99/20,856.74
  6. Step 6: Final answer
    x = 16,261.25

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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.