Home / 21,221.92-31,833.06-5,639.68

Finding the Fourth Proportional to 21,221.92, 31,833.06 and 5,639.68

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Solution

The fourth proportional to 21,221.92, 31,833.06 and 5,639.68 is: 8,459.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.92 : 31,833.06 = 5,639.68 : x
  2. Step 2: Convert to fraction form
    21,221.92/31,833.06 = 5,639.68/x
  3. Step 3: Cross multiply
    21,221.92x = 31,833.06 × 5,639.68
  4. Step 4: Simplify right side
    21,221.92x = 179,528,271.82
  5. Step 5: Solve for x
    x = 179,528,271.82/21,221.92
  6. Step 6: Final answer
    x = 8,459.57

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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.