Home / 13,415.26-20,123.44-6,391.66

Finding the Fourth Proportional to 13,415.26, 20,123.44 and 6,391.66

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Solution

The fourth proportional to 13,415.26, 20,123.44 and 6,391.66 is: 9,587.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.26 : 20,123.44 = 6,391.66 : x
  2. Step 2: Convert to fraction form
    13,415.26/20,123.44 = 6,391.66/x
  3. Step 3: Cross multiply
    13,415.26x = 20,123.44 × 6,391.66
  4. Step 4: Simplify right side
    13,415.26x = 128,622,186.51
  5. Step 5: Solve for x
    x = 128,622,186.51/13,415.26
  6. Step 6: Final answer
    x = 9,587.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.