Home / 12,158.30-18,235.20-3,391.40

Finding the Fourth Proportional to 12,158.30, 18,235.20 and 3,391.40

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Solution

The fourth proportional to 12,158.30, 18,235.20 and 3,391.40 is: 5,086.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,158.30 : 18,235.20 = 3,391.40 : x
  2. Step 2: Convert to fraction form
    12,158.30/18,235.20 = 3,391.40/x
  3. Step 3: Cross multiply
    12,158.30x = 18,235.20 × 3,391.40
  4. Step 4: Simplify right side
    12,158.30x = 61,842,857.28
  5. Step 5: Solve for x
    x = 61,842,857.28/12,158.30
  6. Step 6: Final answer
    x = 5,086.47

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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.