Home / 13,315.98-18,453.74-13,128.06

Finding the Fourth Proportional to 13,315.98, 18,453.74 and 13,128.06

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Solution

The fourth proportional to 13,315.98, 18,453.74 and 13,128.06 is: 18,193.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.98 : 18,453.74 = 13,128.06 : x
  2. Step 2: Convert to fraction form
    13,315.98/18,453.74 = 13,128.06/x
  3. Step 3: Cross multiply
    13,315.98x = 18,453.74 × 13,128.06
  4. Step 4: Simplify right side
    13,315.98x = 242,261,805.94
  5. Step 5: Solve for x
    x = 242,261,805.94/13,315.98
  6. Step 6: Final answer
    x = 18,193.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.