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Finding the Fourth Proportional to 13,169,721.60, 19,796,572.80 and 12,413,894.40

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Solution

The fourth proportional to 13,169,721.60, 19,796,572.80 and 12,413,894.40 is: 18,660,422.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,169,721.60 : 19,796,572.80 = 12,413,894.40 : x
  2. Step 2: Convert to fraction form
    13,169,721.60/19,796,572.80 = 12,413,894.40/x
  3. Step 3: Cross multiply
    13,169,721.60x = 19,796,572.80 × 12,413,894.40
  4. Step 4: Simplify right side
    13,169,721.60x = 245,752,564,221,112.34
  5. Step 5: Solve for x
    x = 245,752,564,221,112.34/13,169,721.60
  6. Step 6: Final answer
    x = 18,660,422.12

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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.