Home / 13,859.79-20,787.86-4,000.07

Finding the Fourth Proportional to 13,859.79, 20,787.86 and 4,000.07

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Solution

The fourth proportional to 13,859.79, 20,787.86 and 4,000.07 is: 5,999.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,859.79 : 20,787.86 = 4,000.07 : x
  2. Step 2: Convert to fraction form
    13,859.79/20,787.86 = 4,000.07/x
  3. Step 3: Cross multiply
    13,859.79x = 20,787.86 × 4,000.07
  4. Step 4: Simplify right side
    13,859.79x = 83,152,771.21
  5. Step 5: Solve for x
    x = 83,152,771.21/13,859.79
  6. Step 6: Final answer
    x = 5,999.57

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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.