Home / 30,686,465.46-42,361,132.42-20,238,679.86

Finding the Fourth Proportional to 30,686,465.46, 42,361,132.42 and 20,238,679.86

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Solution

The fourth proportional to 30,686,465.46, 42,361,132.42 and 20,238,679.86 is: 27,938,486.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,686,465.46 : 42,361,132.42 = 20,238,679.86 : x
  2. Step 2: Convert to fraction form
    30,686,465.46/42,361,132.42 = 20,238,679.86/x
  3. Step 3: Cross multiply
    30,686,465.46x = 42,361,132.42 × 20,238,679.86
  4. Step 4: Simplify right side
    30,686,465.46x = 857,333,397,555,447.12
  5. Step 5: Solve for x
    x = 857,333,397,555,447.12/30,686,465.46
  6. Step 6: Final answer
    x = 27,938,486.39

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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.