Home / 21,007,222,987.80-28,989,881,053.86-11,361,963,727.92

Finding the Fourth Proportional to 21,007,222,987.80, 28,989,881,053.86 and 11,361,963,727.92

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Solution

The fourth proportional to 21,007,222,987.80, 28,989,881,053.86 and 11,361,963,727.92 is: 15,679,463,068.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007,222,987.80 : 28,989,881,053.86 = 11,361,963,727.92 : x
  2. Step 2: Convert to fraction form
    21,007,222,987.80/28,989,881,053.86 = 11,361,963,727.92/x
  3. Step 3: Cross multiply
    21,007,222,987.80x = 28,989,881,053.86 × 11,361,963,727.92
  4. Step 4: Simplify right side
    21,007,222,987.80x = 329,381,977,010,672,566,272
  5. Step 5: Solve for x
    x = 329,381,977,010,672,566,272/21,007,222,987.80
  6. Step 6: Final answer
    x = 15,679,463,068.58

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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.