Home / 21,330.19-31,999.34-9,643.38

Finding the Fourth Proportional to 21,330.19, 31,999.34 and 9,643.38

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Solution

The fourth proportional to 21,330.19, 31,999.34 and 9,643.38 is: 14,466.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.19 : 31,999.34 = 9,643.38 : x
  2. Step 2: Convert to fraction form
    21,330.19/31,999.34 = 9,643.38/x
  3. Step 3: Cross multiply
    21,330.19x = 31,999.34 × 9,643.38
  4. Step 4: Simplify right side
    21,330.19x = 308,581,795.37
  5. Step 5: Solve for x
    x = 308,581,795.37/21,330.19
  6. Step 6: Final answer
    x = 14,466.90

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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.