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Finding the Fourth Proportional to 8,688.96, 13,039.68 and 4,308.48

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Solution

The fourth proportional to 8,688.96, 13,039.68 and 4,308.48 is: 6,465.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.96 : 13,039.68 = 4,308.48 : x
  2. Step 2: Convert to fraction form
    8,688.96/13,039.68 = 4,308.48/x
  3. Step 3: Cross multiply
    8,688.96x = 13,039.68 × 4,308.48
  4. Step 4: Simplify right side
    8,688.96x = 56,181,200.49
  5. Step 5: Solve for x
    x = 56,181,200.49/8,688.96
  6. Step 6: Final answer
    x = 6,465.81

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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.