Home / 13,880.88-20,787.95-7,939.76

Finding the Fourth Proportional to 13,880.88, 20,787.95 and 7,939.76

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Solution

The fourth proportional to 13,880.88, 20,787.95 and 7,939.76 is: 11,890.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,880.88 : 20,787.95 = 7,939.76 : x
  2. Step 2: Convert to fraction form
    13,880.88/20,787.95 = 7,939.76/x
  3. Step 3: Cross multiply
    13,880.88x = 20,787.95 × 7,939.76
  4. Step 4: Simplify right side
    13,880.88x = 165,051,333.89
  5. Step 5: Solve for x
    x = 165,051,333.89/13,880.88
  6. Step 6: Final answer
    x = 11,890.55

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1.5x scale

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.