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Finding the Fourth Proportional to 21,856,515.60, 30,643,911.60 and 21,856,515.60

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Solution

The fourth proportional to 21,856,515.60, 30,643,911.60 and 21,856,515.60 is: 30,643,911.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,856,515.60 : 30,643,911.60 = 21,856,515.60 : x
  2. Step 2: Convert to fraction form
    21,856,515.60/30,643,911.60 = 21,856,515.60/x
  3. Step 3: Cross multiply
    21,856,515.60x = 30,643,911.60 × 21,856,515.60
  4. Step 4: Simplify right side
    21,856,515.60x = 669,769,131,930,421
  5. Step 5: Solve for x
    x = 669,769,131,930,421/21,856,515.60
  6. Step 6: Final answer
    x = 30,643,911.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.