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Finding the Fourth Proportional to 19,319,253.20, 28,978,879.80 and 5,854,331.60

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Solution

The fourth proportional to 19,319,253.20, 28,978,879.80 and 5,854,331.60 is: 8,781,497.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,319,253.20 : 28,978,879.80 = 5,854,331.60 : x
  2. Step 2: Convert to fraction form
    19,319,253.20/28,978,879.80 = 5,854,331.60/x
  3. Step 3: Cross multiply
    19,319,253.20x = 28,978,879.80 × 5,854,331.60
  4. Step 4: Simplify right side
    19,319,253.20x = 169,651,971,745,741.69
  5. Step 5: Solve for x
    x = 169,651,971,745,741.69/19,319,253.20
  6. Step 6: Final answer
    x = 8,781,497.40

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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.