Home / 15,422.40-21,246.44-12,715.99

Finding the Fourth Proportional to 15,422.40, 21,246.44 and 12,715.99

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Solution

The fourth proportional to 15,422.40, 21,246.44 and 12,715.99 is: 17,517.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,422.40 : 21,246.44 = 12,715.99 : x
  2. Step 2: Convert to fraction form
    15,422.40/21,246.44 = 12,715.99/x
  3. Step 3: Cross multiply
    15,422.40x = 21,246.44 × 12,715.99
  4. Step 4: Simplify right side
    15,422.40x = 270,169,401.88
  5. Step 5: Solve for x
    x = 270,169,401.88/15,422.40
  6. Step 6: Final answer
    x = 17,517.99

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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.