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Finding the Fourth Proportional to 7,668,418.80, 11,488,631.40 and 6,240,745.20

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Solution

The fourth proportional to 7,668,418.80, 11,488,631.40 and 6,240,745.20 is: 9,349,726.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,668,418.80 : 11,488,631.40 = 6,240,745.20 : x
  2. Step 2: Convert to fraction form
    7,668,418.80/11,488,631.40 = 6,240,745.20/x
  3. Step 3: Cross multiply
    7,668,418.80x = 11,488,631.40 × 6,240,745.20
  4. Step 4: Simplify right side
    7,668,418.80x = 71,697,621,264,119.28
  5. Step 5: Solve for x
    x = 71,697,621,264,119.28/7,668,418.80
  6. Step 6: Final answer
    x = 9,349,726.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.