Home / 13,920.75-20,880.72-5,155.47

Finding the Fourth Proportional to 13,920.75, 20,880.72 and 5,155.47

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Solution

The fourth proportional to 13,920.75, 20,880.72 and 5,155.47 is: 7,733.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.75 : 20,880.72 = 5,155.47 : x
  2. Step 2: Convert to fraction form
    13,920.75/20,880.72 = 5,155.47/x
  3. Step 3: Cross multiply
    13,920.75x = 20,880.72 × 5,155.47
  4. Step 4: Simplify right side
    13,920.75x = 107,649,925.54
  5. Step 5: Solve for x
    x = 107,649,925.54/13,920.75
  6. Step 6: Final answer
    x = 7,733.06

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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.