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Finding the Fourth Proportional to 8,990.78, 13,486.14 and 2,416.95

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Solution

The fourth proportional to 8,990.78, 13,486.14 and 2,416.95 is: 3,625.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.78 : 13,486.14 = 2,416.95 : x
  2. Step 2: Convert to fraction form
    8,990.78/13,486.14 = 2,416.95/x
  3. Step 3: Cross multiply
    8,990.78x = 13,486.14 × 2,416.95
  4. Step 4: Simplify right side
    8,990.78x = 32,595,326.07
  5. Step 5: Solve for x
    x = 32,595,326.07/8,990.78
  6. Step 6: Final answer
    x = 3,625.42

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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.