Home / 20,686,829.40-28,534,145.13-12,938,419.62

Finding the Fourth Proportional to 20,686,829.40, 28,534,145.13 and 12,938,419.62

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Solution

The fourth proportional to 20,686,829.40, 28,534,145.13 and 12,938,419.62 is: 17,846,463.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686,829.40 : 28,534,145.13 = 12,938,419.62 : x
  2. Step 2: Convert to fraction form
    20,686,829.40/28,534,145.13 = 12,938,419.62/x
  3. Step 3: Cross multiply
    20,686,829.40x = 28,534,145.13 × 12,938,419.62
  4. Step 4: Simplify right side
    20,686,829.40x = 369,186,743,189,919.44
  5. Step 5: Solve for x
    x = 369,186,743,189,919.44/20,686,829.40
  6. Step 6: Final answer
    x = 17,846,463.37

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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.