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Finding the Fourth Proportional to 8,779,905.20, 13,146,238.20 and 6,874,590.80

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Solution

The fourth proportional to 8,779,905.20, 13,146,238.20 and 6,874,590.80 is: 10,293,392.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779,905.20 : 13,146,238.20 = 6,874,590.80 : x
  2. Step 2: Convert to fraction form
    8,779,905.20/13,146,238.20 = 6,874,590.80/x
  3. Step 3: Cross multiply
    8,779,905.20x = 13,146,238.20 × 6,874,590.80
  4. Step 4: Simplify right side
    8,779,905.20x = 90,375,008,184,328.55
  5. Step 5: Solve for x
    x = 90,375,008,184,328.55/8,779,905.20
  6. Step 6: Final answer
    x = 10,293,392.25

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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.