Home / 20,739,959.07-28,616,870.71-11,917,705.70

Finding the Fourth Proportional to 20,739,959.07, 28,616,870.71 and 11,917,705.70

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Solution

The fourth proportional to 20,739,959.07, 28,616,870.71 and 11,917,705.70 is: 16,443,978.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739,959.07 : 28,616,870.71 = 11,917,705.70 : x
  2. Step 2: Convert to fraction form
    20,739,959.07/28,616,870.71 = 11,917,705.70/x
  3. Step 3: Cross multiply
    20,739,959.07x = 28,616,870.71 × 11,917,705.70
  4. Step 4: Simplify right side
    20,739,959.07x = 341,047,443,033,645.69
  5. Step 5: Solve for x
    x = 341,047,443,033,645.69/20,739,959.07
  6. Step 6: Final answer
    x = 16,443,978.60

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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.