Home / 13,525.70-18,678.24-12,789.41

Finding the Fourth Proportional to 13,525.70, 18,678.24 and 12,789.41

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Solution

The fourth proportional to 13,525.70, 18,678.24 and 12,789.41 is: 17,661.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,525.70 : 18,678.24 = 12,789.41 : x
  2. Step 2: Convert to fraction form
    13,525.70/18,678.24 = 12,789.41/x
  3. Step 3: Cross multiply
    13,525.70x = 18,678.24 × 12,789.41
  4. Step 4: Simplify right side
    13,525.70x = 238,883,576.05
  5. Step 5: Solve for x
    x = 238,883,576.05/13,525.70
  6. Step 6: Final answer
    x = 17,661.46

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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.