Home / 13,411.49-20,131.25-9,905.45

Finding the Fourth Proportional to 13,411.49, 20,131.25 and 9,905.45

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Solution

The fourth proportional to 13,411.49, 20,131.25 and 9,905.45 is: 14,868.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,411.49 : 20,131.25 = 9,905.45 : x
  2. Step 2: Convert to fraction form
    13,411.49/20,131.25 = 9,905.45/x
  3. Step 3: Cross multiply
    13,411.49x = 20,131.25 × 9,905.45
  4. Step 4: Simplify right side
    13,411.49x = 199,408,940.13
  5. Step 5: Solve for x
    x = 199,408,940.13/13,411.49
  6. Step 6: Final answer
    x = 14,868.52

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1.5x scale

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.