Home / 13,415.60-20,107.20-6,838.40

Finding the Fourth Proportional to 13,415.60, 20,107.20 and 6,838.40

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Solution

The fourth proportional to 13,415.60, 20,107.20 and 6,838.40 is: 10,249.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.60 : 20,107.20 = 6,838.40 : x
  2. Step 2: Convert to fraction form
    13,415.60/20,107.20 = 6,838.40/x
  3. Step 3: Cross multiply
    13,415.60x = 20,107.20 × 6,838.40
  4. Step 4: Simplify right side
    13,415.60x = 137,501,076.48
  5. Step 5: Solve for x
    x = 137,501,076.48/13,415.60
  6. Step 6: Final answer
    x = 10,249.34

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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.