Home / 19,619.76-29,420.40-7,131

Finding the Fourth Proportional to 19,619.76, 29,420.40 and 7,131

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Solution

The fourth proportional to 19,619.76, 29,420.40 and 7,131 is: 10,693.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,619.76 : 29,420.40 = 7,131 : x
  2. Step 2: Convert to fraction form
    19,619.76/29,420.40 = 7,131/x
  3. Step 3: Cross multiply
    19,619.76x = 29,420.40 × 7,131
  4. Step 4: Simplify right side
    19,619.76x = 209,796,872.40
  5. Step 5: Solve for x
    x = 209,796,872.40/19,619.76
  6. Step 6: Final answer
    x = 10,693.14

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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.