Home / 4,086.31-6,129.89-1,312.32

Finding the Fourth Proportional to 4,086.31, 6,129.89 and 1,312.32

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Solution

The fourth proportional to 4,086.31, 6,129.89 and 1,312.32 is: 1,968.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,086.31 : 6,129.89 = 1,312.32 : x
  2. Step 2: Convert to fraction form
    4,086.31/6,129.89 = 1,312.32/x
  3. Step 3: Cross multiply
    4,086.31x = 6,129.89 × 1,312.32
  4. Step 4: Simplify right side
    4,086.31x = 8,044,370.68
  5. Step 5: Solve for x
    x = 8,044,370.68/4,086.31
  6. Step 6: Final answer
    x = 1,968.62

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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.