Home / 6,145.30-9,215.70-1,986.40

Finding the Fourth Proportional to 6,145.30, 9,215.70 and 1,986.40

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Solution

The fourth proportional to 6,145.30, 9,215.70 and 1,986.40 is: 2,978.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,145.30 : 9,215.70 = 1,986.40 : x
  2. Step 2: Convert to fraction form
    6,145.30/9,215.70 = 1,986.40/x
  3. Step 3: Cross multiply
    6,145.30x = 9,215.70 × 1,986.40
  4. Step 4: Simplify right side
    6,145.30x = 18,306,066.48
  5. Step 5: Solve for x
    x = 18,306,066.48/6,145.30
  6. Step 6: Final answer
    x = 2,978.87

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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.