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Finding the Fourth Proportional to 9,775.15, 13,479.82 and 8,695.01

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Solution

The fourth proportional to 9,775.15, 13,479.82 and 8,695.01 is: 11,990.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,775.15 : 13,479.82 = 8,695.01 : x
  2. Step 2: Convert to fraction form
    9,775.15/13,479.82 = 8,695.01/x
  3. Step 3: Cross multiply
    9,775.15x = 13,479.82 × 8,695.01
  4. Step 4: Simplify right side
    9,775.15x = 117,207,181.66
  5. Step 5: Solve for x
    x = 117,207,181.66/9,775.15
  6. Step 6: Final answer
    x = 11,990.32

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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.