Home / 13,958.18-19,263.36-7,991.72

Finding the Fourth Proportional to 13,958.18, 19,263.36 and 7,991.72

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Solution

The fourth proportional to 13,958.18, 19,263.36 and 7,991.72 is: 11,029.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,958.18 : 19,263.36 = 7,991.72 : x
  2. Step 2: Convert to fraction form
    13,958.18/19,263.36 = 7,991.72/x
  3. Step 3: Cross multiply
    13,958.18x = 19,263.36 × 7,991.72
  4. Step 4: Simplify right side
    13,958.18x = 153,947,379.38
  5. Step 5: Solve for x
    x = 153,947,379.38/13,958.18
  6. Step 6: Final answer
    x = 11,029.19

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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.