Home / 13,320.75-19,981.14-4,086.75

Finding the Fourth Proportional to 13,320.75, 19,981.14 and 4,086.75

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Solution

The fourth proportional to 13,320.75, 19,981.14 and 4,086.75 is: 6,130.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.75 : 19,981.14 = 4,086.75 : x
  2. Step 2: Convert to fraction form
    13,320.75/19,981.14 = 4,086.75/x
  3. Step 3: Cross multiply
    13,320.75x = 19,981.14 × 4,086.75
  4. Step 4: Simplify right side
    13,320.75x = 81,657,923.90
  5. Step 5: Solve for x
    x = 81,657,923.90/13,320.75
  6. Step 6: Final answer
    x = 6,130.13

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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.