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Finding the Fourth Proportional to 9,991.84, 14,985.04 and 3,419.52

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Solution

The fourth proportional to 9,991.84, 14,985.04 and 3,419.52 is: 5,128.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.84 : 14,985.04 = 3,419.52 : x
  2. Step 2: Convert to fraction form
    9,991.84/14,985.04 = 3,419.52/x
  3. Step 3: Cross multiply
    9,991.84x = 14,985.04 × 3,419.52
  4. Step 4: Simplify right side
    9,991.84x = 51,241,643.98
  5. Step 5: Solve for x
    x = 51,241,643.98/9,991.84
  6. Step 6: Final answer
    x = 5,128.35

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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.