Home / 20,686,628.64-28,547,546.16-11,989,845.78

Finding the Fourth Proportional to 20,686,628.64, 28,547,546.16 and 11,989,845.78

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Solution

The fourth proportional to 20,686,628.64, 28,547,546.16 and 11,989,845.78 is: 16,545,986.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686,628.64 : 28,547,546.16 = 11,989,845.78 : x
  2. Step 2: Convert to fraction form
    20,686,628.64/28,547,546.16 = 11,989,845.78/x
  3. Step 3: Cross multiply
    20,686,628.64x = 28,547,546.16 × 11,989,845.78
  4. Step 4: Simplify right side
    20,686,628.64x = 342,280,675,855,831.19
  5. Step 5: Solve for x
    x = 342,280,675,855,831.19/20,686,628.64
  6. Step 6: Final answer
    x = 16,545,986.39

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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.