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Finding the Fourth Proportional to 27,782,978.51, 38,340,012.35 and 15,392,822.69

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Solution

The fourth proportional to 27,782,978.51, 38,340,012.35 and 15,392,822.69 is: 21,241,819.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,782,978.51 : 38,340,012.35 = 15,392,822.69 : x
  2. Step 2: Convert to fraction form
    27,782,978.51/38,340,012.35 = 15,392,822.69/x
  3. Step 3: Cross multiply
    27,782,978.51x = 38,340,012.35 × 15,392,822.69
  4. Step 4: Simplify right side
    27,782,978.51x = 590,161,012,170,292.38
  5. Step 5: Solve for x
    x = 590,161,012,170,292.38/27,782,978.51
  6. Step 6: Final answer
    x = 21,241,819.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.