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Finding the Fourth Proportional to 9,990.94, 14,986.42 and 2,594.78

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Solution

The fourth proportional to 9,990.94, 14,986.42 and 2,594.78 is: 3,892.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.94 : 14,986.42 = 2,594.78 : x
  2. Step 2: Convert to fraction form
    9,990.94/14,986.42 = 2,594.78/x
  3. Step 3: Cross multiply
    9,990.94x = 14,986.42 × 2,594.78
  4. Step 4: Simplify right side
    9,990.94x = 38,886,462.89
  5. Step 5: Solve for x
    x = 38,886,462.89/9,990.94
  6. Step 6: Final answer
    x = 3,892.17

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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.