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Finding the Fourth Proportional to 12,651,703.68, 18,978,290.64 and 3,554,510.40

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Solution

The fourth proportional to 12,651,703.68, 18,978,290.64 and 3,554,510.40 is: 5,331,972.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651,703.68 : 18,978,290.64 = 3,554,510.40 : x
  2. Step 2: Convert to fraction form
    12,651,703.68/18,978,290.64 = 3,554,510.40/x
  3. Step 3: Cross multiply
    12,651,703.68x = 18,978,290.64 × 3,554,510.40
  4. Step 4: Simplify right side
    12,651,703.68x = 67,458,531,454,102.66
  5. Step 5: Solve for x
    x = 67,458,531,454,102.66/12,651,703.68
  6. Step 6: Final answer
    x = 5,331,972.13

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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.