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Finding the Fourth Proportional to 11,123,978.40, 16,685,967.60 and 7,911,712.80

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Solution

The fourth proportional to 11,123,978.40, 16,685,967.60 and 7,911,712.80 is: 11,867,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,123,978.40 : 16,685,967.60 = 7,911,712.80 : x
  2. Step 2: Convert to fraction form
    11,123,978.40/16,685,967.60 = 7,911,712.80/x
  3. Step 3: Cross multiply
    11,123,978.40x = 16,685,967.60 × 7,911,712.80
  4. Step 4: Simplify right side
    11,123,978.40x = 132,014,583,441,305.28
  5. Step 5: Solve for x
    x = 132,014,583,441,305.28/11,123,978.40
  6. Step 6: Final answer
    x = 11,867,569.20

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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.