Home / 21,267.72-31,902.30-7,417.80

Finding the Fourth Proportional to 21,267.72, 31,902.30 and 7,417.80

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Solution

The fourth proportional to 21,267.72, 31,902.30 and 7,417.80 is: 11,126.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,267.72 : 31,902.30 = 7,417.80 : x
  2. Step 2: Convert to fraction form
    21,267.72/31,902.30 = 7,417.80/x
  3. Step 3: Cross multiply
    21,267.72x = 31,902.30 × 7,417.80
  4. Step 4: Simplify right side
    21,267.72x = 236,644,880.94
  5. Step 5: Solve for x
    x = 236,644,880.94/21,267.72
  6. Step 6: Final answer
    x = 11,126.95

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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.