Home / 12,999,421.55-17,938,982.54-7,198,078.73

Finding the Fourth Proportional to 12,999,421.55, 17,938,982.54 and 7,198,078.73

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Solution

The fourth proportional to 12,999,421.55, 17,938,982.54 and 7,198,078.73 is: 9,933,227.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999,421.55 : 17,938,982.54 = 7,198,078.73 : x
  2. Step 2: Convert to fraction form
    12,999,421.55/17,938,982.54 = 7,198,078.73/x
  3. Step 3: Cross multiply
    12,999,421.55x = 17,938,982.54 × 7,198,078.73
  4. Step 4: Simplify right side
    12,999,421.55x = 129,126,208,587,315.66
  5. Step 5: Solve for x
    x = 129,126,208,587,315.66/12,999,421.55
  6. Step 6: Final answer
    x = 9,933,227.26

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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.