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Finding the Fourth Proportional to 10,677,017.80, 15,978,201.90 and 9,781,222.60

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Solution

The fourth proportional to 10,677,017.80, 15,978,201.90 and 9,781,222.60 is: 14,637,640.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,677,017.80 : 15,978,201.90 = 9,781,222.60 : x
  2. Step 2: Convert to fraction form
    10,677,017.80/15,978,201.90 = 9,781,222.60/x
  3. Step 3: Cross multiply
    10,677,017.80x = 15,978,201.90 × 9,781,222.60
  4. Step 4: Simplify right side
    10,677,017.80x = 156,286,349,531,642.94
  5. Step 5: Solve for x
    x = 156,286,349,531,642.94/10,677,017.80
  6. Step 6: Final answer
    x = 14,637,640.63

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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.