Home / 21,457.32-29,583.72-13,890.30

Finding the Fourth Proportional to 21,457.32, 29,583.72 and 13,890.30

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Solution

The fourth proportional to 21,457.32, 29,583.72 and 13,890.30 is: 19,150.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,457.32 : 29,583.72 = 13,890.30 : x
  2. Step 2: Convert to fraction form
    21,457.32/29,583.72 = 13,890.30/x
  3. Step 3: Cross multiply
    21,457.32x = 29,583.72 × 13,890.30
  4. Step 4: Simplify right side
    21,457.32x = 410,926,745.92
  5. Step 5: Solve for x
    x = 410,926,745.92/21,457.32
  6. Step 6: Final answer
    x = 19,150.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.