Home / 30,872.41-42,599.85-19,521.88

Finding the Fourth Proportional to 30,872.41, 42,599.85 and 19,521.88

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Solution

The fourth proportional to 30,872.41, 42,599.85 and 19,521.88 is: 26,937.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,872.41 : 42,599.85 = 19,521.88 : x
  2. Step 2: Convert to fraction form
    30,872.41/42,599.85 = 19,521.88/x
  3. Step 3: Cross multiply
    30,872.41x = 42,599.85 × 19,521.88
  4. Step 4: Simplify right side
    30,872.41x = 831,629,159.72
  5. Step 5: Solve for x
    x = 831,629,159.72/30,872.41
  6. Step 6: Final answer
    x = 26,937.62

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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.