Home / 15,825.78-21,845.09-9,114.12

Finding the Fourth Proportional to 15,825.78, 21,845.09 and 9,114.12

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Solution

The fourth proportional to 15,825.78, 21,845.09 and 9,114.12 is: 12,580.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,825.78 : 21,845.09 = 9,114.12 : x
  2. Step 2: Convert to fraction form
    15,825.78/21,845.09 = 9,114.12/x
  3. Step 3: Cross multiply
    15,825.78x = 21,845.09 × 9,114.12
  4. Step 4: Simplify right side
    15,825.78x = 199,098,794.46
  5. Step 5: Solve for x
    x = 199,098,794.46/15,825.78
  6. Step 6: Final answer
    x = 12,580.66

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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.