Home / 8,638.65-12,925.26-5,130.54

Finding the Fourth Proportional to 8,638.65, 12,925.26 and 5,130.54

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Solution

The fourth proportional to 8,638.65, 12,925.26 and 5,130.54 is: 7,676.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.65 : 12,925.26 = 5,130.54 : x
  2. Step 2: Convert to fraction form
    8,638.65/12,925.26 = 5,130.54/x
  3. Step 3: Cross multiply
    8,638.65x = 12,925.26 × 5,130.54
  4. Step 4: Simplify right side
    8,638.65x = 66,313,563.44
  5. Step 5: Solve for x
    x = 66,313,563.44/8,638.65
  6. Step 6: Final answer
    x = 7,676.38

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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.