Home / 13,458.64-20,190.32-5,561.12

Finding the Fourth Proportional to 13,458.64, 20,190.32 and 5,561.12

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Solution

The fourth proportional to 13,458.64, 20,190.32 and 5,561.12 is: 8,342.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.64 : 20,190.32 = 5,561.12 : x
  2. Step 2: Convert to fraction form
    13,458.64/20,190.32 = 5,561.12/x
  3. Step 3: Cross multiply
    13,458.64x = 20,190.32 × 5,561.12
  4. Step 4: Simplify right side
    13,458.64x = 112,280,792.36
  5. Step 5: Solve for x
    x = 112,280,792.36/13,458.64
  6. Step 6: Final answer
    x = 8,342.66

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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.