Home / 12,968,945,218.80-17,905,929,852.12-8,215,439,405.04

Finding the Fourth Proportional to 12,968,945,218.80, 17,905,929,852.12 and 8,215,439,405.04

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Solution

The fourth proportional to 12,968,945,218.80, 17,905,929,852.12 and 8,215,439,405.04 is: 11,342,871,699.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,968,945,218.80 : 17,905,929,852.12 = 8,215,439,405.04 : x
  2. Step 2: Convert to fraction form
    12,968,945,218.80/17,905,929,852.12 = 8,215,439,405.04/x
  3. Step 3: Cross multiply
    12,968,945,218.80x = 17,905,929,852.12 × 8,215,439,405.04
  4. Step 4: Simplify right side
    12,968,945,218.80x = 147,105,081,690,988,691,456
  5. Step 5: Solve for x
    x = 147,105,081,690,988,691,456/12,968,945,218.80
  6. Step 6: Final answer
    x = 11,342,871,699.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.