Home / 21,061.20-31,573.44-7,910.04

Finding the Fourth Proportional to 21,061.20, 31,573.44 and 7,910.04

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Solution

The fourth proportional to 21,061.20, 31,573.44 and 7,910.04 is: 11,858.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061.20 : 31,573.44 = 7,910.04 : x
  2. Step 2: Convert to fraction form
    21,061.20/31,573.44 = 7,910.04/x
  3. Step 3: Cross multiply
    21,061.20x = 31,573.44 × 7,910.04
  4. Step 4: Simplify right side
    21,061.20x = 249,747,173.34
  5. Step 5: Solve for x
    x = 249,747,173.34/21,061.20
  6. Step 6: Final answer
    x = 11,858.16

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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.