Home / 12,621.24-17,421.26-8,145

Finding the Fourth Proportional to 12,621.24, 17,421.26 and 8,145

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Solution

The fourth proportional to 12,621.24, 17,421.26 and 8,145 is: 11,242.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.24 : 17,421.26 = 8,145 : x
  2. Step 2: Convert to fraction form
    12,621.24/17,421.26 = 8,145/x
  3. Step 3: Cross multiply
    12,621.24x = 17,421.26 × 8,145
  4. Step 4: Simplify right side
    12,621.24x = 141,896,121.98
  5. Step 5: Solve for x
    x = 141,896,121.98/12,621.24
  6. Step 6: Final answer
    x = 11,242.65

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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.