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Finding the Fourth Proportional to 7,888,216.90, 11,807,442.15 and 5,648,728.90

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Solution

The fourth proportional to 7,888,216.90, 11,807,442.15 and 5,648,728.90 is: 8,455,274.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,888,216.90 : 11,807,442.15 = 5,648,728.90 : x
  2. Step 2: Convert to fraction form
    7,888,216.90/11,807,442.15 = 5,648,728.90/x
  3. Step 3: Cross multiply
    7,888,216.90x = 11,807,442.15 × 5,648,728.90
  4. Step 4: Simplify right side
    7,888,216.90x = 66,697,039,707,783.14
  5. Step 5: Solve for x
    x = 66,697,039,707,783.14/7,888,216.90
  6. Step 6: Final answer
    x = 8,455,274.56

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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.