Home / 13,121.93-19,688.68-6,880.45

Finding the Fourth Proportional to 13,121.93, 19,688.68 and 6,880.45

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Solution

The fourth proportional to 13,121.93, 19,688.68 and 6,880.45 is: 10,323.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.93 : 19,688.68 = 6,880.45 : x
  2. Step 2: Convert to fraction form
    13,121.93/19,688.68 = 6,880.45/x
  3. Step 3: Cross multiply
    13,121.93x = 19,688.68 × 6,880.45
  4. Step 4: Simplify right side
    13,121.93x = 135,466,978.31
  5. Step 5: Solve for x
    x = 135,466,978.31/13,121.93
  6. Step 6: Final answer
    x = 10,323.71

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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.