Home / 13,888.79-20,834.57-5,122.56

Finding the Fourth Proportional to 13,888.79, 20,834.57 and 5,122.56

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Solution

The fourth proportional to 13,888.79, 20,834.57 and 5,122.56 is: 7,684.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.79 : 20,834.57 = 5,122.56 : x
  2. Step 2: Convert to fraction form
    13,888.79/20,834.57 = 5,122.56/x
  3. Step 3: Cross multiply
    13,888.79x = 20,834.57 × 5,122.56
  4. Step 4: Simplify right side
    13,888.79x = 106,726,334.90
  5. Step 5: Solve for x
    x = 106,726,334.90/13,888.79
  6. Step 6: Final answer
    x = 7,684.35

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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.