Home / 13,943.12-20,909.48-5,620.32

Finding the Fourth Proportional to 13,943.12, 20,909.48 and 5,620.32

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Solution

The fourth proportional to 13,943.12, 20,909.48 and 5,620.32 is: 8,428.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,943.12 : 20,909.48 = 5,620.32 : x
  2. Step 2: Convert to fraction form
    13,943.12/20,909.48 = 5,620.32/x
  3. Step 3: Cross multiply
    13,943.12x = 20,909.48 × 5,620.32
  4. Step 4: Simplify right side
    13,943.12x = 117,517,940.53
  5. Step 5: Solve for x
    x = 117,517,940.53/13,943.12
  6. Step 6: Final answer
    x = 8,428.38

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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.