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Finding the Fourth Proportional to 13,660,798.20, 20,485,364.07 and 7,907,503.02

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Solution

The fourth proportional to 13,660,798.20, 20,485,364.07 and 7,907,503.02 is: 11,857,877.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,660,798.20 : 20,485,364.07 = 7,907,503.02 : x
  2. Step 2: Convert to fraction form
    13,660,798.20/20,485,364.07 = 7,907,503.02/x
  3. Step 3: Cross multiply
    13,660,798.20x = 20,485,364.07 × 7,907,503.02
  4. Step 4: Simplify right side
    13,660,798.20x = 161,988,078,249,324.50
  5. Step 5: Solve for x
    x = 161,988,078,249,324.50/13,660,798.20
  6. Step 6: Final answer
    x = 11,857,877.99

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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.