Home / 20,689,718.40-28,547,443.08-11,987,361.09

Finding the Fourth Proportional to 20,689,718.40, 28,547,443.08 and 11,987,361.09

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Solution

The fourth proportional to 20,689,718.40, 28,547,443.08 and 11,987,361.09 is: 16,540,027.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689,718.40 : 28,547,443.08 = 11,987,361.09 : x
  2. Step 2: Convert to fraction form
    20,689,718.40/28,547,443.08 = 11,987,361.09/x
  3. Step 3: Cross multiply
    20,689,718.40x = 28,547,443.08 × 11,987,361.09
  4. Step 4: Simplify right side
    20,689,718.40x = 342,208,508,396,181.75
  5. Step 5: Solve for x
    x = 342,208,508,396,181.75/20,689,718.40
  6. Step 6: Final answer
    x = 16,540,027.36

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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.