Home / 12,623.85-17,420.91-7,321.74

Finding the Fourth Proportional to 12,623.85, 17,420.91 and 7,321.74

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Solution

The fourth proportional to 12,623.85, 17,420.91 and 7,321.74 is: 10,103.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,623.85 : 17,420.91 = 7,321.74 : x
  2. Step 2: Convert to fraction form
    12,623.85/17,420.91 = 7,321.74/x
  3. Step 3: Cross multiply
    12,623.85x = 17,420.91 × 7,321.74
  4. Step 4: Simplify right side
    12,623.85x = 127,551,280.80
  5. Step 5: Solve for x
    x = 127,551,280.80/12,623.85
  6. Step 6: Final answer
    x = 10,103.99

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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.