Home / 13,139.67-18,133.02-8,106.33

Finding the Fourth Proportional to 13,139.67, 18,133.02 and 8,106.33

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Solution

The fourth proportional to 13,139.67, 18,133.02 and 8,106.33 is: 11,186.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.67 : 18,133.02 = 8,106.33 : x
  2. Step 2: Convert to fraction form
    13,139.67/18,133.02 = 8,106.33/x
  3. Step 3: Cross multiply
    13,139.67x = 18,133.02 × 8,106.33
  4. Step 4: Simplify right side
    13,139.67x = 146,992,244.02
  5. Step 5: Solve for x
    x = 146,992,244.02/13,139.67
  6. Step 6: Final answer
    x = 11,186.91

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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.