Home / 13,385.65-18,430.96-11,890.97

Finding the Fourth Proportional to 13,385.65, 18,430.96 and 11,890.97

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Solution

The fourth proportional to 13,385.65, 18,430.96 and 11,890.97 is: 16,372.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.65 : 18,430.96 = 11,890.97 : x
  2. Step 2: Convert to fraction form
    13,385.65/18,430.96 = 11,890.97/x
  3. Step 3: Cross multiply
    13,385.65x = 18,430.96 × 11,890.97
  4. Step 4: Simplify right side
    13,385.65x = 219,161,932.98
  5. Step 5: Solve for x
    x = 219,161,932.98/13,385.65
  6. Step 6: Final answer
    x = 16,372.91

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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.