Home / 21,856.60-30,161.82-12,424.54

Finding the Fourth Proportional to 21,856.60, 30,161.82 and 12,424.54

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Solution

The fourth proportional to 21,856.60, 30,161.82 and 12,424.54 is: 17,145.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,856.60 : 30,161.82 = 12,424.54 : x
  2. Step 2: Convert to fraction form
    21,856.60/30,161.82 = 12,424.54/x
  3. Step 3: Cross multiply
    21,856.60x = 30,161.82 × 12,424.54
  4. Step 4: Simplify right side
    21,856.60x = 374,746,739.06
  5. Step 5: Solve for x
    x = 374,746,739.06/21,856.60
  6. Step 6: Final answer
    x = 17,145.70

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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.