Home / 21,007,128.76-28,989,964.06-11,715,285.44

Finding the Fourth Proportional to 21,007,128.76, 28,989,964.06 and 11,715,285.44

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Solution

The fourth proportional to 21,007,128.76, 28,989,964.06 and 11,715,285.44 is: 16,167,164.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007,128.76 : 28,989,964.06 = 11,715,285.44 : x
  2. Step 2: Convert to fraction form
    21,007,128.76/28,989,964.06 = 11,715,285.44/x
  3. Step 3: Cross multiply
    21,007,128.76x = 28,989,964.06 × 11,715,285.44
  4. Step 4: Simplify right side
    21,007,128.76x = 339,625,703,901,428
  5. Step 5: Solve for x
    x = 339,625,703,901,428/21,007,128.76
  6. Step 6: Final answer
    x = 16,167,164.39

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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.