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Finding the Fourth Proportional to 8,685.96, 13,014.36 and 5,390.88

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Solution

The fourth proportional to 8,685.96, 13,014.36 and 5,390.88 is: 8,077.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.96 : 13,014.36 = 5,390.88 : x
  2. Step 2: Convert to fraction form
    8,685.96/13,014.36 = 5,390.88/x
  3. Step 3: Cross multiply
    8,685.96x = 13,014.36 × 5,390.88
  4. Step 4: Simplify right side
    8,685.96x = 70,158,853.04
  5. Step 5: Solve for x
    x = 70,158,853.04/8,685.96
  6. Step 6: Final answer
    x = 8,077.27

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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.