Home / 12,478.53-17,216.23-8,231.70

Finding the Fourth Proportional to 12,478.53, 17,216.23 and 8,231.70

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Solution

The fourth proportional to 12,478.53, 17,216.23 and 8,231.70 is: 11,357.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.53 : 17,216.23 = 8,231.70 : x
  2. Step 2: Convert to fraction form
    12,478.53/17,216.23 = 8,231.70/x
  3. Step 3: Cross multiply
    12,478.53x = 17,216.23 × 8,231.70
  4. Step 4: Simplify right side
    12,478.53x = 141,718,840.49
  5. Step 5: Solve for x
    x = 141,718,840.49/12,478.53
  6. Step 6: Final answer
    x = 11,357.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.