Home / 15,351.88-21,223.65-15,211.75

Finding the Fourth Proportional to 15,351.88, 21,223.65 and 15,211.75

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Solution

The fourth proportional to 15,351.88, 21,223.65 and 15,211.75 is: 21,029.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,351.88 : 21,223.65 = 15,211.75 : x
  2. Step 2: Convert to fraction form
    15,351.88/21,223.65 = 15,211.75/x
  3. Step 3: Cross multiply
    15,351.88x = 21,223.65 × 15,211.75
  4. Step 4: Simplify right side
    15,351.88x = 322,848,857.89
  5. Step 5: Solve for x
    x = 322,848,857.89/15,351.88
  6. Step 6: Final answer
    x = 21,029.92

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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.