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Finding the Fourth Proportional to 15,354,976,251.80, 21,525,990,517 and 15,354,976,251.80

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Solution

The fourth proportional to 15,354,976,251.80, 21,525,990,517 and 15,354,976,251.80 is: 21,525,990,517

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,354,976,251.80 : 21,525,990,517 = 15,354,976,251.80 : x
  2. Step 2: Convert to fraction form
    15,354,976,251.80/21,525,990,517 = 15,354,976,251.80/x
  3. Step 3: Cross multiply
    15,354,976,251.80x = 21,525,990,517 × 15,354,976,251.80
  4. Step 4: Simplify right side
    15,354,976,251.80x = 330,531,073,185,007,009,792
  5. Step 5: Solve for x
    x = 330,531,073,185,007,009,792/15,354,976,251.80
  6. Step 6: Final answer
    x = 21,525,990,517

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.