Home / 21,211.37-31,822.88-6,420.87

Finding the Fourth Proportional to 21,211.37, 31,822.88 and 6,420.87

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Solution

The fourth proportional to 21,211.37, 31,822.88 and 6,420.87 is: 9,633.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.37 : 31,822.88 = 6,420.87 : x
  2. Step 2: Convert to fraction form
    21,211.37/31,822.88 = 6,420.87/x
  3. Step 3: Cross multiply
    21,211.37x = 31,822.88 × 6,420.87
  4. Step 4: Simplify right side
    21,211.37x = 204,330,543.40
  5. Step 5: Solve for x
    x = 204,330,543.40/21,211.37
  6. Step 6: Final answer
    x = 9,633.07

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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.