Home / 13,781.06-20,659.23-5,455.47

Finding the Fourth Proportional to 13,781.06, 20,659.23 and 5,455.47

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Solution

The fourth proportional to 13,781.06, 20,659.23 and 5,455.47 is: 8,178.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.06 : 20,659.23 = 5,455.47 : x
  2. Step 2: Convert to fraction form
    13,781.06/20,659.23 = 5,455.47/x
  3. Step 3: Cross multiply
    13,781.06x = 20,659.23 × 5,455.47
  4. Step 4: Simplify right side
    13,781.06x = 112,705,809.49
  5. Step 5: Solve for x
    x = 112,705,809.49/13,781.06
  6. Step 6: Final answer
    x = 8,178.31

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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.