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Finding the Fourth Proportional to 13,288,643.70, 18,616,698.30 and 13,288,643.70

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Solution

The fourth proportional to 13,288,643.70, 18,616,698.30 and 13,288,643.70 is: 18,616,698.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288,643.70 : 18,616,698.30 = 13,288,643.70 : x
  2. Step 2: Convert to fraction form
    13,288,643.70/18,616,698.30 = 13,288,643.70/x
  3. Step 3: Cross multiply
    13,288,643.70x = 18,616,698.30 × 13,288,643.70
  4. Step 4: Simplify right side
    13,288,643.70x = 247,390,670,579,095.72
  5. Step 5: Solve for x
    x = 247,390,670,579,095.72/13,288,643.70
  6. Step 6: Final answer
    x = 18,616,698.30

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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.