Home / 15,108.78-20,845.80-9,136.12

Finding the Fourth Proportional to 15,108.78, 20,845.80 and 9,136.12

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Solution

The fourth proportional to 15,108.78, 20,845.80 and 9,136.12 is: 12,605.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108.78 : 20,845.80 = 9,136.12 : x
  2. Step 2: Convert to fraction form
    15,108.78/20,845.80 = 9,136.12/x
  3. Step 3: Cross multiply
    15,108.78x = 20,845.80 × 9,136.12
  4. Step 4: Simplify right side
    15,108.78x = 190,449,730.30
  5. Step 5: Solve for x
    x = 190,449,730.30/15,108.78
  6. Step 6: Final answer
    x = 12,605.24

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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.