Home / 34,135.78-51,219.89-15,421.54

Finding the Fourth Proportional to 34,135.78, 51,219.89 and 15,421.54

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Solution

The fourth proportional to 34,135.78, 51,219.89 and 15,421.54 is: 23,139.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,135.78 : 51,219.89 = 15,421.54 : x
  2. Step 2: Convert to fraction form
    34,135.78/51,219.89 = 15,421.54/x
  3. Step 3: Cross multiply
    34,135.78x = 51,219.89 × 15,421.54
  4. Step 4: Simplify right side
    34,135.78x = 789,889,617.89
  5. Step 5: Solve for x
    x = 789,889,617.89/34,135.78
  6. Step 6: Final answer
    x = 23,139.64

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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.