Home / 30,713.12-42,361.34-21,156.06

Finding the Fourth Proportional to 30,713.12, 42,361.34 and 21,156.06

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Solution

The fourth proportional to 30,713.12, 42,361.34 and 21,156.06 is: 29,179.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,713.12 : 42,361.34 = 21,156.06 : x
  2. Step 2: Convert to fraction form
    30,713.12/42,361.34 = 21,156.06/x
  3. Step 3: Cross multiply
    30,713.12x = 42,361.34 × 21,156.06
  4. Step 4: Simplify right side
    30,713.12x = 896,199,050.72
  5. Step 5: Solve for x
    x = 896,199,050.72/30,713.12
  6. Step 6: Final answer
    x = 29,179.68

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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.