Home / 15,290.62-21,072.48-11,928.10

Finding the Fourth Proportional to 15,290.62, 21,072.48 and 11,928.10

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Solution

The fourth proportional to 15,290.62, 21,072.48 and 11,928.10 is: 16,438.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,290.62 : 21,072.48 = 11,928.10 : x
  2. Step 2: Convert to fraction form
    15,290.62/21,072.48 = 11,928.10/x
  3. Step 3: Cross multiply
    15,290.62x = 21,072.48 × 11,928.10
  4. Step 4: Simplify right side
    15,290.62x = 251,354,648.69
  5. Step 5: Solve for x
    x = 251,354,648.69/15,290.62
  6. Step 6: Final answer
    x = 16,438.49

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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.