Home / 12,581.72-18,870.12-11,957.30

Finding the Fourth Proportional to 12,581.72, 18,870.12 and 11,957.30

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Solution

The fourth proportional to 12,581.72, 18,870.12 and 11,957.30 is: 17,933.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.72 : 18,870.12 = 11,957.30 : x
  2. Step 2: Convert to fraction form
    12,581.72/18,870.12 = 11,957.30/x
  3. Step 3: Cross multiply
    12,581.72x = 18,870.12 × 11,957.30
  4. Step 4: Simplify right side
    12,581.72x = 225,635,685.88
  5. Step 5: Solve for x
    x = 225,635,685.88/12,581.72
  6. Step 6: Final answer
    x = 17,933.61

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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.