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Finding the Fourth Proportional to 15,135.13, 20,886.50 and 8,511.13

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Solution

The fourth proportional to 15,135.13, 20,886.50 and 8,511.13 is: 11,745.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,135.13 : 20,886.50 = 8,511.13 : x
  2. Step 2: Convert to fraction form
    15,135.13/20,886.50 = 8,511.13/x
  3. Step 3: Cross multiply
    15,135.13x = 20,886.50 × 8,511.13
  4. Step 4: Simplify right side
    15,135.13x = 177,767,569.76
  5. Step 5: Solve for x
    x = 177,767,569.76/15,135.13
  6. Step 6: Final answer
    x = 11,745.37

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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.