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Finding the Fourth Proportional to 6,702,573.12, 9,978,056.40 and 6,662,721.12

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Solution

The fourth proportional to 6,702,573.12, 9,978,056.40 and 6,662,721.12 is: 9,918,729.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,702,573.12 : 9,978,056.40 = 6,662,721.12 : x
  2. Step 2: Convert to fraction form
    6,702,573.12/9,978,056.40 = 6,662,721.12/x
  3. Step 3: Cross multiply
    6,702,573.12x = 9,978,056.40 × 6,662,721.12
  4. Step 4: Simplify right side
    6,702,573.12x = 66,481,007,112,831.17
  5. Step 5: Solve for x
    x = 66,481,007,112,831.17/6,702,573.12
  6. Step 6: Final answer
    x = 9,918,729.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.