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Finding the Fourth Proportional to 20,653,435.10, 30,978,840.45 and 7,006,555.10

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Solution

The fourth proportional to 20,653,435.10, 30,978,840.45 and 7,006,555.10 is: 10,509,387.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653,435.10 : 30,978,840.45 = 7,006,555.10 : x
  2. Step 2: Convert to fraction form
    20,653,435.10/30,978,840.45 = 7,006,555.10/x
  3. Step 3: Cross multiply
    20,653,435.10x = 30,978,840.45 × 7,006,555.10
  4. Step 4: Simplify right side
    20,653,435.10x = 217,054,952,547,033.78
  5. Step 5: Solve for x
    x = 217,054,952,547,033.78/20,653,435.10
  6. Step 6: Final answer
    x = 10,509,387.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.