Home / 20,808,721.20-31,213,081.80-19,958,415.60

Finding the Fourth Proportional to 20,808,721.20, 31,213,081.80 and 19,958,415.60

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Solution

The fourth proportional to 20,808,721.20, 31,213,081.80 and 19,958,415.60 is: 29,937,623.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808,721.20 : 31,213,081.80 = 19,958,415.60 : x
  2. Step 2: Convert to fraction form
    20,808,721.20/31,213,081.80 = 19,958,415.60/x
  3. Step 3: Cross multiply
    20,808,721.20x = 31,213,081.80 × 19,958,415.60
  4. Step 4: Simplify right side
    20,808,721.20x = 622,963,658,721,196.12
  5. Step 5: Solve for x
    x = 622,963,658,721,196.12/20,808,721.20
  6. Step 6: Final answer
    x = 29,937,623.40

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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.