Home / 9,991.62-13,787.55-5,515.02

Finding the Fourth Proportional to 9,991.62, 13,787.55 and 5,515.02

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Solution

The fourth proportional to 9,991.62, 13,787.55 and 5,515.02 is: 7,610.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.62 : 13,787.55 = 5,515.02 : x
  2. Step 2: Convert to fraction form
    9,991.62/13,787.55 = 5,515.02/x
  3. Step 3: Cross multiply
    9,991.62x = 13,787.55 × 5,515.02
  4. Step 4: Simplify right side
    9,991.62x = 76,038,614.00
  5. Step 5: Solve for x
    x = 76,038,614.00/9,991.62
  6. Step 6: Final answer
    x = 7,610.24

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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.