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Finding the Fourth Proportional to 10,479.71, 15,721.48 and 3,460.20

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Solution

The fourth proportional to 10,479.71, 15,721.48 and 3,460.20 is: 5,190.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,479.71 : 15,721.48 = 3,460.20 : x
  2. Step 2: Convert to fraction form
    10,479.71/15,721.48 = 3,460.20/x
  3. Step 3: Cross multiply
    10,479.71x = 15,721.48 × 3,460.20
  4. Step 4: Simplify right side
    10,479.71x = 54,399,420.20
  5. Step 5: Solve for x
    x = 54,399,420.20/10,479.71
  6. Step 6: Final answer
    x = 5,190.93

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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.