Home / 13,986.87-20,962.98-6,485.91

Finding the Fourth Proportional to 13,986.87, 20,962.98 and 6,485.91

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Solution

The fourth proportional to 13,986.87, 20,962.98 and 6,485.91 is: 9,720.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.87 : 20,962.98 = 6,485.91 : x
  2. Step 2: Convert to fraction form
    13,986.87/20,962.98 = 6,485.91/x
  3. Step 3: Cross multiply
    13,986.87x = 20,962.98 × 6,485.91
  4. Step 4: Simplify right side
    13,986.87x = 135,964,001.61
  5. Step 5: Solve for x
    x = 135,964,001.61/13,986.87
  6. Step 6: Final answer
    x = 9,720.83

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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.