Home / 13,628.55-18,806.80-7,963.83

Finding the Fourth Proportional to 13,628.55, 18,806.80 and 7,963.83

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Solution

The fourth proportional to 13,628.55, 18,806.80 and 7,963.83 is: 10,989.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,628.55 : 18,806.80 = 7,963.83 : x
  2. Step 2: Convert to fraction form
    13,628.55/18,806.80 = 7,963.83/x
  3. Step 3: Cross multiply
    13,628.55x = 18,806.80 × 7,963.83
  4. Step 4: Simplify right side
    13,628.55x = 149,774,158.04
  5. Step 5: Solve for x
    x = 149,774,158.04/13,628.55
  6. Step 6: Final answer
    x = 10,989.74

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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.