Home / 13,991.72-19,310.46-12,810.68

Finding the Fourth Proportional to 13,991.72, 19,310.46 and 12,810.68

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Solution

The fourth proportional to 13,991.72, 19,310.46 and 12,810.68 is: 17,680.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.72 : 19,310.46 = 12,810.68 : x
  2. Step 2: Convert to fraction form
    13,991.72/19,310.46 = 12,810.68/x
  3. Step 3: Cross multiply
    13,991.72x = 19,310.46 × 12,810.68
  4. Step 4: Simplify right side
    13,991.72x = 247,380,123.71
  5. Step 5: Solve for x
    x = 247,380,123.71/13,991.72
  6. Step 6: Final answer
    x = 17,680.47

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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.