Home / 13,385.13-20,077.82-5,485.61

Finding the Fourth Proportional to 13,385.13, 20,077.82 and 5,485.61

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Solution

The fourth proportional to 13,385.13, 20,077.82 and 5,485.61 is: 8,228.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.13 : 20,077.82 = 5,485.61 : x
  2. Step 2: Convert to fraction form
    13,385.13/20,077.82 = 5,485.61/x
  3. Step 3: Cross multiply
    13,385.13x = 20,077.82 × 5,485.61
  4. Step 4: Simplify right side
    13,385.13x = 110,139,090.17
  5. Step 5: Solve for x
    x = 110,139,090.17/13,385.13
  6. Step 6: Final answer
    x = 8,228.47

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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.