Home / 20,805,919.12-28,717,938.48-12,105,772.12

Finding the Fourth Proportional to 20,805,919.12, 28,717,938.48 and 12,105,772.12

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Solution

The fourth proportional to 20,805,919.12, 28,717,938.48 and 12,105,772.12 is: 16,709,322.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805,919.12 : 28,717,938.48 = 12,105,772.12 : x
  2. Step 2: Convert to fraction form
    20,805,919.12/28,717,938.48 = 12,105,772.12/x
  3. Step 3: Cross multiply
    20,805,919.12x = 28,717,938.48 × 12,105,772.12
  4. Step 4: Simplify right side
    20,805,919.12x = 347,652,818,995,059.19
  5. Step 5: Solve for x
    x = 347,652,818,995,059.19/20,805,919.12
  6. Step 6: Final answer
    x = 16,709,322.81

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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.