Home / 15,631.92-21,571.26-8,917.29

Finding the Fourth Proportional to 15,631.92, 21,571.26 and 8,917.29

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Solution

The fourth proportional to 15,631.92, 21,571.26 and 8,917.29 is: 12,305.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,631.92 : 21,571.26 = 8,917.29 : x
  2. Step 2: Convert to fraction form
    15,631.92/21,571.26 = 8,917.29/x
  3. Step 3: Cross multiply
    15,631.92x = 21,571.26 × 8,917.29
  4. Step 4: Simplify right side
    15,631.92x = 192,357,197.81
  5. Step 5: Solve for x
    x = 192,357,197.81/15,631.92
  6. Step 6: Final answer
    x = 12,305.41

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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.