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Finding the Fourth Proportional to 19,376,978.40, 29,065,467.60 and 5,913,784.80

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Solution

The fourth proportional to 19,376,978.40, 29,065,467.60 and 5,913,784.80 is: 8,870,677.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,376,978.40 : 29,065,467.60 = 5,913,784.80 : x
  2. Step 2: Convert to fraction form
    19,376,978.40/29,065,467.60 = 5,913,784.80/x
  3. Step 3: Cross multiply
    19,376,978.40x = 29,065,467.60 × 5,913,784.80
  4. Step 4: Simplify right side
    19,376,978.40x = 171,886,920,497,772.47
  5. Step 5: Solve for x
    x = 171,886,920,497,772.47/19,376,978.40
  6. Step 6: Final answer
    x = 8,870,677.20

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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.