Home / 15,314.64-21,134.13-8,945.61

Finding the Fourth Proportional to 15,314.64, 21,134.13 and 8,945.61

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Solution

The fourth proportional to 15,314.64, 21,134.13 and 8,945.61 is: 12,344.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,314.64 : 21,134.13 = 8,945.61 : x
  2. Step 2: Convert to fraction form
    15,314.64/21,134.13 = 8,945.61/x
  3. Step 3: Cross multiply
    15,314.64x = 21,134.13 × 8,945.61
  4. Step 4: Simplify right side
    15,314.64x = 189,057,571.87
  5. Step 5: Solve for x
    x = 189,057,571.87/15,314.64
  6. Step 6: Final answer
    x = 12,344.89

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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.