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Finding the Fourth Proportional to 11,988,815.76, 17,978,490 and 4,799,009.52

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Solution

The fourth proportional to 11,988,815.76, 17,978,490 and 4,799,009.52 is: 7,196,619.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988,815.76 : 17,978,490 = 4,799,009.52 : x
  2. Step 2: Convert to fraction form
    11,988,815.76/17,978,490 = 4,799,009.52/x
  3. Step 3: Cross multiply
    11,988,815.76x = 17,978,490 × 4,799,009.52
  4. Step 4: Simplify right side
    11,988,815.76x = 86,278,944,665,224.80
  5. Step 5: Solve for x
    x = 86,278,944,665,224.80/11,988,815.76
  6. Step 6: Final answer
    x = 7,196,619.45

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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.