Home / 13,870.05-20,787.20-12,083.88

Finding the Fourth Proportional to 13,870.05, 20,787.20 and 12,083.88

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Solution

The fourth proportional to 13,870.05, 20,787.20 and 12,083.88 is: 18,110.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.05 : 20,787.20 = 12,083.88 : x
  2. Step 2: Convert to fraction form
    13,870.05/20,787.20 = 12,083.88/x
  3. Step 3: Cross multiply
    13,870.05x = 20,787.20 × 12,083.88
  4. Step 4: Simplify right side
    13,870.05x = 251,190,030.34
  5. Step 5: Solve for x
    x = 251,190,030.34/13,870.05
  6. Step 6: Final answer
    x = 18,110.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.