Home / 15,857.43-21,883.12-9,486.78

Finding the Fourth Proportional to 15,857.43, 21,883.12 and 9,486.78

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Solution

The fourth proportional to 15,857.43, 21,883.12 and 9,486.78 is: 13,091.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.43 : 21,883.12 = 9,486.78 : x
  2. Step 2: Convert to fraction form
    15,857.43/21,883.12 = 9,486.78/x
  3. Step 3: Cross multiply
    15,857.43x = 21,883.12 × 9,486.78
  4. Step 4: Simplify right side
    15,857.43x = 207,600,345.15
  5. Step 5: Solve for x
    x = 207,600,345.15/15,857.43
  6. Step 6: Final answer
    x = 13,091.68

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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.