Home / 13,619.32-20,429.70-4,385.56

Finding the Fourth Proportional to 13,619.32, 20,429.70 and 4,385.56

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Solution

The fourth proportional to 13,619.32, 20,429.70 and 4,385.56 is: 6,578.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619.32 : 20,429.70 = 4,385.56 : x
  2. Step 2: Convert to fraction form
    13,619.32/20,429.70 = 4,385.56/x
  3. Step 3: Cross multiply
    13,619.32x = 20,429.70 × 4,385.56
  4. Step 4: Simplify right side
    13,619.32x = 89,595,675.13
  5. Step 5: Solve for x
    x = 89,595,675.13/13,619.32
  6. Step 6: Final answer
    x = 6,578.57

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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.