Home / 21,312.37-31,971.30-11,438.11

Finding the Fourth Proportional to 21,312.37, 31,971.30 and 11,438.11

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Solution

The fourth proportional to 21,312.37, 31,971.30 and 11,438.11 is: 17,158.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.37 : 31,971.30 = 11,438.11 : x
  2. Step 2: Convert to fraction form
    21,312.37/31,971.30 = 11,438.11/x
  3. Step 3: Cross multiply
    21,312.37x = 31,971.30 × 11,438.11
  4. Step 4: Simplify right side
    21,312.37x = 365,691,246.24
  5. Step 5: Solve for x
    x = 365,691,246.24/21,312.37
  6. Step 6: Final answer
    x = 17,158.64

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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.