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Finding the Fourth Proportional to 28,729,002.17, 39,646,978.68 and 15,676,977.08

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Solution

The fourth proportional to 28,729,002.17, 39,646,978.68 and 15,676,977.08 is: 21,634,749.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,729,002.17 : 39,646,978.68 = 15,676,977.08 : x
  2. Step 2: Convert to fraction form
    28,729,002.17/39,646,978.68 = 15,676,977.08/x
  3. Step 3: Cross multiply
    28,729,002.17x = 39,646,978.68 × 15,676,977.08
  4. Step 4: Simplify right side
    28,729,002.17x = 621,544,776,057,608.62
  5. Step 5: Solve for x
    x = 621,544,776,057,608.62/28,729,002.17
  6. Step 6: Final answer
    x = 21,634,749.87

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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.