Home / 21,308.79-29,406.33-11,749.02

Finding the Fourth Proportional to 21,308.79, 29,406.33 and 11,749.02

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Solution

The fourth proportional to 21,308.79, 29,406.33 and 11,749.02 is: 16,213.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.79 : 29,406.33 = 11,749.02 : x
  2. Step 2: Convert to fraction form
    21,308.79/29,406.33 = 11,749.02/x
  3. Step 3: Cross multiply
    21,308.79x = 29,406.33 × 11,749.02
  4. Step 4: Simplify right side
    21,308.79x = 345,495,559.30
  5. Step 5: Solve for x
    x = 345,495,559.30/21,308.79
  6. Step 6: Final answer
    x = 16,213.76

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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.