Home / 20,686,620.74-28,547,535.27-11,989,837.90

Finding the Fourth Proportional to 20,686,620.74, 28,547,535.27 and 11,989,837.90

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Solution

The fourth proportional to 20,686,620.74, 28,547,535.27 and 11,989,837.90 is: 16,545,975.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686,620.74 : 28,547,535.27 = 11,989,837.90 : x
  2. Step 2: Convert to fraction form
    20,686,620.74/28,547,535.27 = 11,989,837.90/x
  3. Step 3: Cross multiply
    20,686,620.74x = 28,547,535.27 × 11,989,837.90
  4. Step 4: Simplify right side
    20,686,620.74x = 342,280,320,211,576
  5. Step 5: Solve for x
    x = 342,280,320,211,576/20,686,620.74
  6. Step 6: Final answer
    x = 16,545,975.51

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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.