Home / 13,870.55-20,787.95-12,084.39

Finding the Fourth Proportional to 13,870.55, 20,787.95 and 12,084.39

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Solution

The fourth proportional to 13,870.55, 20,787.95 and 12,084.39 is: 18,111.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.55 : 20,787.95 = 12,084.39 : x
  2. Step 2: Convert to fraction form
    13,870.55/20,787.95 = 12,084.39/x
  3. Step 3: Cross multiply
    13,870.55x = 20,787.95 × 12,084.39
  4. Step 4: Simplify right side
    13,870.55x = 251,209,634.68
  5. Step 5: Solve for x
    x = 251,209,634.68/13,870.55
  6. Step 6: Final answer
    x = 18,111.01

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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.