Home / 12,720,511.39-18,936,903.07-12,644,843.07

Finding the Fourth Proportional to 12,720,511.39, 18,936,903.07 and 12,644,843.07

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Solution

The fourth proportional to 12,720,511.39, 18,936,903.07 and 12,644,843.07 is: 18,824,256.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720,511.39 : 18,936,903.07 = 12,644,843.07 : x
  2. Step 2: Convert to fraction form
    12,720,511.39/18,936,903.07 = 12,644,843.07/x
  3. Step 3: Cross multiply
    12,720,511.39x = 18,936,903.07 × 12,644,843.07
  4. Step 4: Simplify right side
    12,720,511.39x = 239,454,167,629,881.34
  5. Step 5: Solve for x
    x = 239,454,167,629,881.34/12,720,511.39
  6. Step 6: Final answer
    x = 18,824,256.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.