Home / 12,720,505.80-17,557,415.48-7,217,101.95

Finding the Fourth Proportional to 12,720,505.80, 17,557,415.48 and 7,217,101.95

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Solution

The fourth proportional to 12,720,505.80, 17,557,415.48 and 7,217,101.95 is: 9,961,369.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720,505.80 : 17,557,415.48 = 7,217,101.95 : x
  2. Step 2: Convert to fraction form
    12,720,505.80/17,557,415.48 = 7,217,101.95/x
  3. Step 3: Cross multiply
    12,720,505.80x = 17,557,415.48 × 7,217,101.95
  4. Step 4: Simplify right side
    12,720,505.80x = 126,713,657,497,668.19
  5. Step 5: Solve for x
    x = 126,713,657,497,668.19/12,720,505.80
  6. Step 6: Final answer
    x = 9,961,369.42

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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.