Home / 18,915,888.42-28,270,189.86-13,809,072.12

Finding the Fourth Proportional to 18,915,888.42, 28,270,189.86 and 13,809,072.12

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Solution

The fourth proportional to 18,915,888.42, 28,270,189.86 and 13,809,072.12 is: 20,637,946.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915,888.42 : 28,270,189.86 = 13,809,072.12 : x
  2. Step 2: Convert to fraction form
    18,915,888.42/28,270,189.86 = 13,809,072.12/x
  3. Step 3: Cross multiply
    18,915,888.42x = 28,270,189.86 × 13,809,072.12
  4. Step 4: Simplify right side
    18,915,888.42x = 390,385,090,622,832.69
  5. Step 5: Solve for x
    x = 390,385,090,622,832.69/18,915,888.42
  6. Step 6: Final answer
    x = 20,637,946.36

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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.