Home / 13,285.60-19,921.20-5,485.60

Finding the Fourth Proportional to 13,285.60, 19,921.20 and 5,485.60

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Solution

The fourth proportional to 13,285.60, 19,921.20 and 5,485.60 is: 8,225.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,285.60 : 19,921.20 = 5,485.60 : x
  2. Step 2: Convert to fraction form
    13,285.60/19,921.20 = 5,485.60/x
  3. Step 3: Cross multiply
    13,285.60x = 19,921.20 × 5,485.60
  4. Step 4: Simplify right side
    13,285.60x = 109,279,734.72
  5. Step 5: Solve for x
    x = 109,279,734.72/13,285.60
  6. Step 6: Final answer
    x = 8,225.43

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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.