Home / 15,713.96-21,685.54-8,640.68

Finding the Fourth Proportional to 15,713.96, 21,685.54 and 8,640.68

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Solution

The fourth proportional to 15,713.96, 21,685.54 and 8,640.68 is: 11,924.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,713.96 : 21,685.54 = 8,640.68 : x
  2. Step 2: Convert to fraction form
    15,713.96/21,685.54 = 8,640.68/x
  3. Step 3: Cross multiply
    15,713.96x = 21,685.54 × 8,640.68
  4. Step 4: Simplify right side
    15,713.96x = 187,377,811.77
  5. Step 5: Solve for x
    x = 187,377,811.77/15,713.96
  6. Step 6: Final answer
    x = 11,924.29

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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.