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Finding the Fourth Proportional to 20,199,386.60, 28,350,885.78 and 20,199,386.60

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Solution

The fourth proportional to 20,199,386.60, 28,350,885.78 and 20,199,386.60 is: 28,350,885.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,199,386.60 : 28,350,885.78 = 20,199,386.60 : x
  2. Step 2: Convert to fraction form
    20,199,386.60/28,350,885.78 = 20,199,386.60/x
  3. Step 3: Cross multiply
    20,199,386.60x = 28,350,885.78 × 20,199,386.60
  4. Step 4: Simplify right side
    20,199,386.60x = 572,670,502,322,662.62
  5. Step 5: Solve for x
    x = 572,670,502,322,662.62/20,199,386.60
  6. Step 6: Final answer
    x = 28,350,885.78

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.