Home / 21,236.72-31,855.80-5,655.92

Finding the Fourth Proportional to 21,236.72, 31,855.80 and 5,655.92

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Solution

The fourth proportional to 21,236.72, 31,855.80 and 5,655.92 is: 8,484.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,236.72 : 31,855.80 = 5,655.92 : x
  2. Step 2: Convert to fraction form
    21,236.72/31,855.80 = 5,655.92/x
  3. Step 3: Cross multiply
    21,236.72x = 31,855.80 × 5,655.92
  4. Step 4: Simplify right side
    21,236.72x = 180,173,856.34
  5. Step 5: Solve for x
    x = 180,173,856.34/21,236.72
  6. Step 6: Final answer
    x = 8,484.07

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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.