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Finding the Fourth Proportional to 15,709.82, 23,571.54 and 7,820.15

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Solution

The fourth proportional to 15,709.82, 23,571.54 and 7,820.15 is: 11,733.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.82 : 23,571.54 = 7,820.15 : x
  2. Step 2: Convert to fraction form
    15,709.82/23,571.54 = 7,820.15/x
  3. Step 3: Cross multiply
    15,709.82x = 23,571.54 × 7,820.15
  4. Step 4: Simplify right side
    15,709.82x = 184,332,860.67
  5. Step 5: Solve for x
    x = 184,332,860.67/15,709.82
  6. Step 6: Final answer
    x = 11,733.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.