Home / 4,087.90-6,129.33-1,621.63

Finding the Fourth Proportional to 4,087.90, 6,129.33 and 1,621.63

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Solution

The fourth proportional to 4,087.90, 6,129.33 and 1,621.63 is: 2,431.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,087.90 : 6,129.33 = 1,621.63 : x
  2. Step 2: Convert to fraction form
    4,087.90/6,129.33 = 1,621.63/x
  3. Step 3: Cross multiply
    4,087.90x = 6,129.33 × 1,621.63
  4. Step 4: Simplify right side
    4,087.90x = 9,939,505.41
  5. Step 5: Solve for x
    x = 9,939,505.41/4,087.90
  6. Step 6: Final answer
    x = 2,431.45

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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.