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Finding the Fourth Proportional to 13,208,580.30, 19,781,377.65 and 13,208,580.30

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Solution

The fourth proportional to 13,208,580.30, 19,781,377.65 and 13,208,580.30 is: 19,781,377.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,208,580.30 : 19,781,377.65 = 13,208,580.30 : x
  2. Step 2: Convert to fraction form
    13,208,580.30/19,781,377.65 = 13,208,580.30/x
  3. Step 3: Cross multiply
    13,208,580.30x = 19,781,377.65 × 13,208,580.30
  4. Step 4: Simplify right side
    13,208,580.30x = 261,283,915,134,650.28
  5. Step 5: Solve for x
    x = 261,283,915,134,650.28/13,208,580.30
  6. Step 6: Final answer
    x = 19,781,377.65

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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.