Home / 13,137,191,986.96-18,128,383,759.89-7,711,947,880.21

Finding the Fourth Proportional to 13,137,191,986.96, 18,128,383,759.89 and 7,711,947,880.21

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Solution

The fourth proportional to 13,137,191,986.96, 18,128,383,759.89 and 7,711,947,880.21 is: 10,641,935,570.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137,191,986.96 : 18,128,383,759.89 = 7,711,947,880.21 : x
  2. Step 2: Convert to fraction form
    13,137,191,986.96/18,128,383,759.89 = 7,711,947,880.21/x
  3. Step 3: Cross multiply
    13,137,191,986.96x = 18,128,383,759.89 × 7,711,947,880.21
  4. Step 4: Simplify right side
    13,137,191,986.96x = 139,805,150,708,773,715,968
  5. Step 5: Solve for x
    x = 139,805,150,708,773,715,968/13,137,191,986.96
  6. Step 6: Final answer
    x = 10,641,935,570.98

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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.