Home / 13,489.40-18,615.45-7,521.44

Finding the Fourth Proportional to 13,489.40, 18,615.45 and 7,521.44

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Solution

The fourth proportional to 13,489.40, 18,615.45 and 7,521.44 is: 10,379.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.40 : 18,615.45 = 7,521.44 : x
  2. Step 2: Convert to fraction form
    13,489.40/18,615.45 = 7,521.44/x
  3. Step 3: Cross multiply
    13,489.40x = 18,615.45 × 7,521.44
  4. Step 4: Simplify right side
    13,489.40x = 140,014,990.25
  5. Step 5: Solve for x
    x = 140,014,990.25/13,489.40
  6. Step 6: Final answer
    x = 10,379.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.