Home / 13,659.80-20,502.45-7,090.61

Finding the Fourth Proportional to 13,659.80, 20,502.45 and 7,090.61

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Solution

The fourth proportional to 13,659.80, 20,502.45 and 7,090.61 is: 10,642.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.80 : 20,502.45 = 7,090.61 : x
  2. Step 2: Convert to fraction form
    13,659.80/20,502.45 = 7,090.61/x
  3. Step 3: Cross multiply
    13,659.80x = 20,502.45 × 7,090.61
  4. Step 4: Simplify right side
    13,659.80x = 145,374,774.48
  5. Step 5: Solve for x
    x = 145,374,774.48/13,659.80
  6. Step 6: Final answer
    x = 10,642.53

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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.