Home / 13,411.76-20,104.59-6,389.90

Finding the Fourth Proportional to 13,411.76, 20,104.59 and 6,389.90

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Solution

The fourth proportional to 13,411.76, 20,104.59 and 6,389.90 is: 9,578.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,411.76 : 20,104.59 = 6,389.90 : x
  2. Step 2: Convert to fraction form
    13,411.76/20,104.59 = 6,389.90/x
  3. Step 3: Cross multiply
    13,411.76x = 20,104.59 × 6,389.90
  4. Step 4: Simplify right side
    13,411.76x = 128,466,319.64
  5. Step 5: Solve for x
    x = 128,466,319.64/13,411.76
  6. Step 6: Final answer
    x = 9,578.63

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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.