Home / 15,749.89-21,734.85-8,676.31

Finding the Fourth Proportional to 15,749.89, 21,734.85 and 8,676.31

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Solution

The fourth proportional to 15,749.89, 21,734.85 and 8,676.31 is: 11,973.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,749.89 : 21,734.85 = 8,676.31 : x
  2. Step 2: Convert to fraction form
    15,749.89/21,734.85 = 8,676.31/x
  3. Step 3: Cross multiply
    15,749.89x = 21,734.85 × 8,676.31
  4. Step 4: Simplify right side
    15,749.89x = 188,578,253.02
  5. Step 5: Solve for x
    x = 188,578,253.02/15,749.89
  6. Step 6: Final answer
    x = 11,973.31

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1.5x scale

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.