Home / 13,640.21-20,454.34-6,881.63

Finding the Fourth Proportional to 13,640.21, 20,454.34 and 6,881.63

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Solution

The fourth proportional to 13,640.21, 20,454.34 and 6,881.63 is: 10,319.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.21 : 20,454.34 = 6,881.63 : x
  2. Step 2: Convert to fraction form
    13,640.21/20,454.34 = 6,881.63/x
  3. Step 3: Cross multiply
    13,640.21x = 20,454.34 × 6,881.63
  4. Step 4: Simplify right side
    13,640.21x = 140,759,276.72
  5. Step 5: Solve for x
    x = 140,759,276.72/13,640.21
  6. Step 6: Final answer
    x = 10,319.44

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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.