Home / 9,965.90-13,753.30-5,490

Finding the Fourth Proportional to 9,965.90, 13,753.30 and 5,490

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Solution

The fourth proportional to 9,965.90, 13,753.30 and 5,490 is: 7,576.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,965.90 : 13,753.30 = 5,490 : x
  2. Step 2: Convert to fraction form
    9,965.90/13,753.30 = 5,490/x
  3. Step 3: Cross multiply
    9,965.90x = 13,753.30 × 5,490
  4. Step 4: Simplify right side
    9,965.90x = 75,505,617
  5. Step 5: Solve for x
    x = 75,505,617/9,965.90
  6. Step 6: Final answer
    x = 7,576.40

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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.