Home / 12,630.56-18,937.20-8,178.08

Finding the Fourth Proportional to 12,630.56, 18,937.20 and 8,178.08

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Solution

The fourth proportional to 12,630.56, 18,937.20 and 8,178.08 is: 12,261.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,630.56 : 18,937.20 = 8,178.08 : x
  2. Step 2: Convert to fraction form
    12,630.56/18,937.20 = 8,178.08/x
  3. Step 3: Cross multiply
    12,630.56x = 18,937.20 × 8,178.08
  4. Step 4: Simplify right side
    12,630.56x = 154,869,936.58
  5. Step 5: Solve for x
    x = 154,869,936.58/12,630.56
  6. Step 6: Final answer
    x = 12,261.53

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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.