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Finding the Fourth Proportional to 6,648,635.80, 9,972,953.70 and 6,606,645.40

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Solution

The fourth proportional to 6,648,635.80, 9,972,953.70 and 6,606,645.40 is: 9,909,968.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,648,635.80 : 9,972,953.70 = 6,606,645.40 : x
  2. Step 2: Convert to fraction form
    6,648,635.80/9,972,953.70 = 6,606,645.40/x
  3. Step 3: Cross multiply
    6,648,635.80x = 9,972,953.70 × 6,606,645.40
  4. Step 4: Simplify right side
    6,648,635.80x = 65,887,768,686,517.98
  5. Step 5: Solve for x
    x = 65,887,768,686,517.98/6,648,635.80
  6. Step 6: Final answer
    x = 9,909,968.10

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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.