Home / 13,977.70-19,269.43-9,991.89

Finding the Fourth Proportional to 13,977.70, 19,269.43 and 9,991.89

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Solution

The fourth proportional to 13,977.70, 19,269.43 and 9,991.89 is: 13,774.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,977.70 : 19,269.43 = 9,991.89 : x
  2. Step 2: Convert to fraction form
    13,977.70/19,269.43 = 9,991.89/x
  3. Step 3: Cross multiply
    13,977.70x = 19,269.43 × 9,991.89
  4. Step 4: Simplify right side
    13,977.70x = 192,537,999.94
  5. Step 5: Solve for x
    x = 192,537,999.94/13,977.70
  6. Step 6: Final answer
    x = 13,774.66

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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.