Home / 15,515.82-21,396.94-10,422.86

Finding the Fourth Proportional to 15,515.82, 21,396.94 and 10,422.86

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Solution

The fourth proportional to 15,515.82, 21,396.94 and 10,422.86 is: 14,373.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.82 : 21,396.94 = 10,422.86 : x
  2. Step 2: Convert to fraction form
    15,515.82/21,396.94 = 10,422.86/x
  3. Step 3: Cross multiply
    15,515.82x = 21,396.94 × 10,422.86
  4. Step 4: Simplify right side
    15,515.82x = 223,017,177.01
  5. Step 5: Solve for x
    x = 223,017,177.01/15,515.82
  6. Step 6: Final answer
    x = 14,373.53

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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.