Home / 13,729.97-18,947.32-7,442.35

Finding the Fourth Proportional to 13,729.97, 18,947.32 and 7,442.35

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Solution

The fourth proportional to 13,729.97, 18,947.32 and 7,442.35 is: 10,270.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.97 : 18,947.32 = 7,442.35 : x
  2. Step 2: Convert to fraction form
    13,729.97/18,947.32 = 7,442.35/x
  3. Step 3: Cross multiply
    13,729.97x = 18,947.32 × 7,442.35
  4. Step 4: Simplify right side
    13,729.97x = 141,012,521.03
  5. Step 5: Solve for x
    x = 141,012,521.03/13,729.97
  6. Step 6: Final answer
    x = 10,270.42

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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.