Home / 21,139.93-29,173.03-12,187.38

Finding the Fourth Proportional to 21,139.93, 29,173.03 and 12,187.38

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Solution

The fourth proportional to 21,139.93, 29,173.03 and 12,187.38 is: 16,818.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.93 : 29,173.03 = 12,187.38 : x
  2. Step 2: Convert to fraction form
    21,139.93/29,173.03 = 12,187.38/x
  3. Step 3: Cross multiply
    21,139.93x = 29,173.03 × 12,187.38
  4. Step 4: Simplify right side
    21,139.93x = 355,542,802.36
  5. Step 5: Solve for x
    x = 355,542,802.36/21,139.93
  6. Step 6: Final answer
    x = 16,818.54

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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.