Home / 15,860.12-21,887.66-8,786.54

Finding the Fourth Proportional to 15,860.12, 21,887.66 and 8,786.54

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Solution

The fourth proportional to 15,860.12, 21,887.66 and 8,786.54 is: 12,125.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,860.12 : 21,887.66 = 8,786.54 : x
  2. Step 2: Convert to fraction form
    15,860.12/21,887.66 = 8,786.54/x
  3. Step 3: Cross multiply
    15,860.12x = 21,887.66 × 8,786.54
  4. Step 4: Simplify right side
    15,860.12x = 192,316,800.10
  5. Step 5: Solve for x
    x = 192,316,800.10/15,860.12
  6. Step 6: Final answer
    x = 12,125.81

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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.