Home / 15,391.83-21,198.25-13,266.57

Finding the Fourth Proportional to 15,391.83, 21,198.25 and 13,266.57

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Solution

The fourth proportional to 15,391.83, 21,198.25 and 13,266.57 is: 18,271.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.83 : 21,198.25 = 13,266.57 : x
  2. Step 2: Convert to fraction form
    15,391.83/21,198.25 = 13,266.57/x
  3. Step 3: Cross multiply
    15,391.83x = 21,198.25 × 13,266.57
  4. Step 4: Simplify right side
    15,391.83x = 281,228,088.95
  5. Step 5: Solve for x
    x = 281,228,088.95/15,391.83
  6. Step 6: Final answer
    x = 18,271.26

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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.