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Finding the Fourth Proportional to 17,621,978.20, 26,432,385.66 and 7,246,838.20

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Solution

The fourth proportional to 17,621,978.20, 26,432,385.66 and 7,246,838.20 is: 10,870,018.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,621,978.20 : 26,432,385.66 = 7,246,838.20 : x
  2. Step 2: Convert to fraction form
    17,621,978.20/26,432,385.66 = 7,246,838.20/x
  3. Step 3: Cross multiply
    17,621,978.20x = 26,432,385.66 × 7,246,838.20
  4. Step 4: Simplify right side
    17,621,978.20x = 191,551,222,118,020.22
  5. Step 5: Solve for x
    x = 191,551,222,118,020.22/17,621,978.20
  6. Step 6: Final answer
    x = 10,870,018.11

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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.