Home / 13,920.84-20,870.94-5,154.12

Finding the Fourth Proportional to 13,920.84, 20,870.94 and 5,154.12

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Solution

The fourth proportional to 13,920.84, 20,870.94 and 5,154.12 is: 7,727.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.84 : 20,870.94 = 5,154.12 : x
  2. Step 2: Convert to fraction form
    13,920.84/20,870.94 = 5,154.12/x
  3. Step 3: Cross multiply
    13,920.84x = 20,870.94 × 5,154.12
  4. Step 4: Simplify right side
    13,920.84x = 107,571,329.27
  5. Step 5: Solve for x
    x = 107,571,329.27/13,920.84
  6. Step 6: Final answer
    x = 7,727.36

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1.5x scale

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.