Home / 13,695.40-18,866.88-13,028.36

Finding the Fourth Proportional to 13,695.40, 18,866.88 and 13,028.36

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Solution

The fourth proportional to 13,695.40, 18,866.88 and 13,028.36 is: 17,947.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,695.40 : 18,866.88 = 13,028.36 : x
  2. Step 2: Convert to fraction form
    13,695.40/18,866.88 = 13,028.36/x
  3. Step 3: Cross multiply
    13,695.40x = 18,866.88 × 13,028.36
  4. Step 4: Simplify right side
    13,695.40x = 245,804,504.72
  5. Step 5: Solve for x
    x = 245,804,504.72/13,695.40
  6. Step 6: Final answer
    x = 17,947.96

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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.