Home / 13,405.32-20,108.21-4,640.45

Finding the Fourth Proportional to 13,405.32, 20,108.21 and 4,640.45

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Solution

The fourth proportional to 13,405.32, 20,108.21 and 4,640.45 is: 6,960.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.32 : 20,108.21 = 4,640.45 : x
  2. Step 2: Convert to fraction form
    13,405.32/20,108.21 = 4,640.45/x
  3. Step 3: Cross multiply
    13,405.32x = 20,108.21 × 4,640.45
  4. Step 4: Simplify right side
    13,405.32x = 93,311,019.35
  5. Step 5: Solve for x
    x = 93,311,019.35/13,405.32
  6. Step 6: Final answer
    x = 6,960.75

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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.