Home / 21,211.80-31,807.44-6,417.96

Finding the Fourth Proportional to 21,211.80, 31,807.44 and 6,417.96

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Solution

The fourth proportional to 21,211.80, 31,807.44 and 6,417.96 is: 9,623.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.80 : 31,807.44 = 6,417.96 : x
  2. Step 2: Convert to fraction form
    21,211.80/31,807.44 = 6,417.96/x
  3. Step 3: Cross multiply
    21,211.80x = 31,807.44 × 6,417.96
  4. Step 4: Simplify right side
    21,211.80x = 204,138,877.62
  5. Step 5: Solve for x
    x = 204,138,877.62/21,211.80
  6. Step 6: Final answer
    x = 9,623.84

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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.