Home / 30,840.31-42,567.61-20,111.93

Finding the Fourth Proportional to 30,840.31, 42,567.61 and 20,111.93

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Solution

The fourth proportional to 30,840.31, 42,567.61 and 20,111.93 is: 27,759.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,840.31 : 42,567.61 = 20,111.93 : x
  2. Step 2: Convert to fraction form
    30,840.31/42,567.61 = 20,111.93/x
  3. Step 3: Cross multiply
    30,840.31x = 42,567.61 × 20,111.93
  4. Step 4: Simplify right side
    30,840.31x = 856,116,792.59
  5. Step 5: Solve for x
    x = 856,116,792.59/30,840.31
  6. Step 6: Final answer
    x = 27,759.67

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.