Home / 13,571.25-18,728.31-7,521.90

Finding the Fourth Proportional to 13,571.25, 18,728.31 and 7,521.90

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Solution

The fourth proportional to 13,571.25, 18,728.31 and 7,521.90 is: 10,380.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,571.25 : 18,728.31 = 7,521.90 : x
  2. Step 2: Convert to fraction form
    13,571.25/18,728.31 = 7,521.90/x
  3. Step 3: Cross multiply
    13,571.25x = 18,728.31 × 7,521.90
  4. Step 4: Simplify right side
    13,571.25x = 140,872,474.99
  5. Step 5: Solve for x
    x = 140,872,474.99/13,571.25
  6. Step 6: Final answer
    x = 10,380.21

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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.