Home / 20,739,268.14-28,612,207.71-12,990,821.10

Finding the Fourth Proportional to 20,739,268.14, 28,612,207.71 and 12,990,821.10

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Solution

The fourth proportional to 20,739,268.14, 28,612,207.71 and 12,990,821.10 is: 17,922,333.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739,268.14 : 28,612,207.71 = 12,990,821.10 : x
  2. Step 2: Convert to fraction form
    20,739,268.14/28,612,207.71 = 12,990,821.10/x
  3. Step 3: Cross multiply
    20,739,268.14x = 28,612,207.71 × 12,990,821.10
  4. Step 4: Simplify right side
    20,739,268.14x = 371,696,071,636,650.69
  5. Step 5: Solve for x
    x = 371,696,071,636,650.69/20,739,268.14
  6. Step 6: Final answer
    x = 17,922,333.09

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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.