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Finding the Fourth Proportional to 13,888.92, 20,829.54 and 6,486.12

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Solution

The fourth proportional to 13,888.92, 20,829.54 and 6,486.12 is: 9,727.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.92 : 20,829.54 = 6,486.12 : x
  2. Step 2: Convert to fraction form
    13,888.92/20,829.54 = 6,486.12/x
  3. Step 3: Cross multiply
    13,888.92x = 20,829.54 × 6,486.12
  4. Step 4: Simplify right side
    13,888.92x = 135,102,895.98
  5. Step 5: Solve for x
    x = 135,102,895.98/13,888.92
  6. Step 6: Final answer
    x = 9,727.39

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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.