Home / 13,458.79-20,196.60-5,139.55

Finding the Fourth Proportional to 13,458.79, 20,196.60 and 5,139.55

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Solution

The fourth proportional to 13,458.79, 20,196.60 and 5,139.55 is: 7,712.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.79 : 20,196.60 = 5,139.55 : x
  2. Step 2: Convert to fraction form
    13,458.79/20,196.60 = 5,139.55/x
  3. Step 3: Cross multiply
    13,458.79x = 20,196.60 × 5,139.55
  4. Step 4: Simplify right side
    13,458.79x = 103,801,435.53
  5. Step 5: Solve for x
    x = 103,801,435.53/13,458.79
  6. Step 6: Final answer
    x = 7,712.54

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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.