Home / 20,856.72-28,782.60-11,424.66

Finding the Fourth Proportional to 20,856.72, 28,782.60 and 11,424.66

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Solution

The fourth proportional to 20,856.72, 28,782.60 and 11,424.66 is: 15,766.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.72 : 28,782.60 = 11,424.66 : x
  2. Step 2: Convert to fraction form
    20,856.72/28,782.60 = 11,424.66/x
  3. Step 3: Cross multiply
    20,856.72x = 28,782.60 × 11,424.66
  4. Step 4: Simplify right side
    20,856.72x = 328,831,418.92
  5. Step 5: Solve for x
    x = 328,831,418.92/20,856.72
  6. Step 6: Final answer
    x = 15,766.21

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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.