Home / 12,139.44-16,643.13-11,918.00

Finding the Fourth Proportional to 12,139.44, 16,643.13 and 11,918.00

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Solution

The fourth proportional to 12,139.44, 16,643.13 and 11,918.00 is: 16,339.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.44 : 16,643.13 = 11,918.00 : x
  2. Step 2: Convert to fraction form
    12,139.44/16,643.13 = 11,918.00/x
  3. Step 3: Cross multiply
    12,139.44x = 16,643.13 × 11,918.00
  4. Step 4: Simplify right side
    12,139.44x = 198,352,740.12
  5. Step 5: Solve for x
    x = 198,352,740.12/12,139.44
  6. Step 6: Final answer
    x = 16,339.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.