Home / 13,489.29-18,615.60-7,520.76

Finding the Fourth Proportional to 13,489.29, 18,615.60 and 7,520.76

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Solution

The fourth proportional to 13,489.29, 18,615.60 and 7,520.76 is: 10,378.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.29 : 18,615.60 = 7,520.76 : x
  2. Step 2: Convert to fraction form
    13,489.29/18,615.60 = 7,520.76/x
  3. Step 3: Cross multiply
    13,489.29x = 18,615.60 × 7,520.76
  4. Step 4: Simplify right side
    13,489.29x = 140,003,459.86
  5. Step 5: Solve for x
    x = 140,003,459.86/13,489.29
  6. Step 6: Final answer
    x = 10,378.86

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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.