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Finding the Fourth Proportional to 21,978,064.80, 32,967,097.20 and 18,730,807.20

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Solution

The fourth proportional to 21,978,064.80, 32,967,097.20 and 18,730,807.20 is: 28,096,210.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,978,064.80 : 32,967,097.20 = 18,730,807.20 : x
  2. Step 2: Convert to fraction form
    21,978,064.80/32,967,097.20 = 18,730,807.20/x
  3. Step 3: Cross multiply
    21,978,064.80x = 32,967,097.20 × 18,730,807.20
  4. Step 4: Simplify right side
    21,978,064.80x = 617,500,341,596,859.75
  5. Step 5: Solve for x
    x = 617,500,341,596,859.75/21,978,064.80
  6. Step 6: Final answer
    x = 28,096,210.80

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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.