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Finding the Fourth Proportional to 21,969,878.80, 32,964,149.40 and 10,604,477.20

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Solution

The fourth proportional to 21,969,878.80, 32,964,149.40 and 10,604,477.20 is: 15,911,219.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969,878.80 : 32,964,149.40 = 10,604,477.20 : x
  2. Step 2: Convert to fraction form
    21,969,878.80/32,964,149.40 = 10,604,477.20/x
  3. Step 3: Cross multiply
    21,969,878.80x = 32,964,149.40 × 10,604,477.20
  4. Step 4: Simplify right side
    21,969,878.80x = 349,567,570,729,693.62
  5. Step 5: Solve for x
    x = 349,567,570,729,693.62/21,969,878.80
  6. Step 6: Final answer
    x = 15,911,219.81

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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.