Home / 10,929.84-16,395.48-3,138.72

Finding the Fourth Proportional to 10,929.84, 16,395.48 and 3,138.72

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Solution

The fourth proportional to 10,929.84, 16,395.48 and 3,138.72 is: 4,708.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,929.84 : 16,395.48 = 3,138.72 : x
  2. Step 2: Convert to fraction form
    10,929.84/16,395.48 = 3,138.72/x
  3. Step 3: Cross multiply
    10,929.84x = 16,395.48 × 3,138.72
  4. Step 4: Simplify right side
    10,929.84x = 51,460,820.99
  5. Step 5: Solve for x
    x = 51,460,820.99/10,929.84
  6. Step 6: Final answer
    x = 4,708.29

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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.