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Finding the Fourth Proportional to 9,888.68, 13,650.32 and 6,486.99

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Solution

The fourth proportional to 9,888.68, 13,650.32 and 6,486.99 is: 8,954.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,888.68 : 13,650.32 = 6,486.99 : x
  2. Step 2: Convert to fraction form
    9,888.68/13,650.32 = 6,486.99/x
  3. Step 3: Cross multiply
    9,888.68x = 13,650.32 × 6,486.99
  4. Step 4: Simplify right side
    9,888.68x = 88,549,456.90
  5. Step 5: Solve for x
    x = 88,549,456.90/9,888.68
  6. Step 6: Final answer
    x = 8,954.63

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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.