Home / 20,749.12-28,638.96-12,364

Finding the Fourth Proportional to 20,749.12, 28,638.96 and 12,364

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Solution

The fourth proportional to 20,749.12, 28,638.96 and 12,364 is: 17,065.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.12 : 28,638.96 = 12,364 : x
  2. Step 2: Convert to fraction form
    20,749.12/28,638.96 = 12,364/x
  3. Step 3: Cross multiply
    20,749.12x = 28,638.96 × 12,364
  4. Step 4: Simplify right side
    20,749.12x = 354,092,101.44
  5. Step 5: Solve for x
    x = 354,092,101.44/20,749.12
  6. Step 6: Final answer
    x = 17,065.40

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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.