Home / 15,135.75-20,887.38-8,511.75

Finding the Fourth Proportional to 15,135.75, 20,887.38 and 8,511.75

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Solution

The fourth proportional to 15,135.75, 20,887.38 and 8,511.75 is: 11,746.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,135.75 : 20,887.38 = 8,511.75 : x
  2. Step 2: Convert to fraction form
    15,135.75/20,887.38 = 8,511.75/x
  3. Step 3: Cross multiply
    15,135.75x = 20,887.38 × 8,511.75
  4. Step 4: Simplify right side
    15,135.75x = 177,788,156.72
  5. Step 5: Solve for x
    x = 177,788,156.72/15,135.75
  6. Step 6: Final answer
    x = 11,746.24

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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.