Home / 15,840.92-21,856.76-10,815.61

Finding the Fourth Proportional to 15,840.92, 21,856.76 and 10,815.61

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Solution

The fourth proportional to 15,840.92, 21,856.76 and 10,815.61 is: 14,923.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,840.92 : 21,856.76 = 10,815.61 : x
  2. Step 2: Convert to fraction form
    15,840.92/21,856.76 = 10,815.61/x
  3. Step 3: Cross multiply
    15,840.92x = 21,856.76 × 10,815.61
  4. Step 4: Simplify right side
    15,840.92x = 236,394,028.66
  5. Step 5: Solve for x
    x = 236,394,028.66/15,840.92
  6. Step 6: Final answer
    x = 14,923.00

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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.