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Finding the Fourth Proportional to 21,978,068.80, 32,967,103.20 and 18,730,811.20

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Solution

The fourth proportional to 21,978,068.80, 32,967,103.20 and 18,730,811.20 is: 28,096,216.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,978,068.80 : 32,967,103.20 = 18,730,811.20 : x
  2. Step 2: Convert to fraction form
    21,978,068.80/32,967,103.20 = 18,730,811.20/x
  3. Step 3: Cross multiply
    21,978,068.80x = 32,967,103.20 × 18,730,811.20
  4. Step 4: Simplify right side
    21,978,068.80x = 617,500,585,850,115.75
  5. Step 5: Solve for x
    x = 617,500,585,850,115.75/21,978,068.80
  6. Step 6: Final answer
    x = 28,096,216.80

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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.