Home / 20,980,731.47-28,945,729.09-12,714,830.75

Finding the Fourth Proportional to 20,980,731.47, 28,945,729.09 and 12,714,830.75

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Solution

The fourth proportional to 20,980,731.47, 28,945,729.09 and 12,714,830.75 is: 17,541,811.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980,731.47 : 28,945,729.09 = 12,714,830.75 : x
  2. Step 2: Convert to fraction form
    20,980,731.47/28,945,729.09 = 12,714,830.75/x
  3. Step 3: Cross multiply
    20,980,731.47x = 28,945,729.09 × 12,714,830.75
  4. Step 4: Simplify right side
    20,980,731.47x = 368,040,046,402,959.38
  5. Step 5: Solve for x
    x = 368,040,046,402,959.38/20,980,731.47
  6. Step 6: Final answer
    x = 17,541,811.97

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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.