Home / 13,319.15-18,370.03-8,539.55

Finding the Fourth Proportional to 13,319.15, 18,370.03 and 8,539.55

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Solution

The fourth proportional to 13,319.15, 18,370.03 and 8,539.55 is: 11,777.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.15 : 18,370.03 = 8,539.55 : x
  2. Step 2: Convert to fraction form
    13,319.15/18,370.03 = 8,539.55/x
  3. Step 3: Cross multiply
    13,319.15x = 18,370.03 × 8,539.55
  4. Step 4: Simplify right side
    13,319.15x = 156,871,789.69
  5. Step 5: Solve for x
    x = 156,871,789.69/13,319.15
  6. Step 6: Final answer
    x = 11,777.91

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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.