Home / 13,638.76-20,458.37-4,278.56

Finding the Fourth Proportional to 13,638.76, 20,458.37 and 4,278.56

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Solution

The fourth proportional to 13,638.76, 20,458.37 and 4,278.56 is: 6,417.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.76 : 20,458.37 = 4,278.56 : x
  2. Step 2: Convert to fraction form
    13,638.76/20,458.37 = 4,278.56/x
  3. Step 3: Cross multiply
    13,638.76x = 20,458.37 × 4,278.56
  4. Step 4: Simplify right side
    13,638.76x = 87,532,363.55
  5. Step 5: Solve for x
    x = 87,532,363.55/13,638.76
  6. Step 6: Final answer
    x = 6,417.91

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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.