Home / 13,999.60-21,000.21-5,679.28

Finding the Fourth Proportional to 13,999.60, 21,000.21 and 5,679.28

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Solution

The fourth proportional to 13,999.60, 21,000.21 and 5,679.28 is: 8,519.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.60 : 21,000.21 = 5,679.28 : x
  2. Step 2: Convert to fraction form
    13,999.60/21,000.21 = 5,679.28/x
  3. Step 3: Cross multiply
    13,999.60x = 21,000.21 × 5,679.28
  4. Step 4: Simplify right side
    13,999.60x = 119,266,072.65
  5. Step 5: Solve for x
    x = 119,266,072.65/13,999.60
  6. Step 6: Final answer
    x = 8,519.25

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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.