Home / 13,639.39-20,462.64-4,279.70

Finding the Fourth Proportional to 13,639.39, 20,462.64 and 4,279.70

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Solution

The fourth proportional to 13,639.39, 20,462.64 and 4,279.70 is: 6,420.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.39 : 20,462.64 = 4,279.70 : x
  2. Step 2: Convert to fraction form
    13,639.39/20,462.64 = 4,279.70/x
  3. Step 3: Cross multiply
    13,639.39x = 20,462.64 × 4,279.70
  4. Step 4: Simplify right side
    13,639.39x = 87,573,960.41
  5. Step 5: Solve for x
    x = 87,573,960.41/13,639.39
  6. Step 6: Final answer
    x = 6,420.67

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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.