Home / 15,712.37-21,682.76-8,638.79

Finding the Fourth Proportional to 15,712.37, 21,682.76 and 8,638.79

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Solution

The fourth proportional to 15,712.37, 21,682.76 and 8,638.79 is: 11,921.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,712.37 : 21,682.76 = 8,638.79 : x
  2. Step 2: Convert to fraction form
    15,712.37/21,682.76 = 8,638.79/x
  3. Step 3: Cross multiply
    15,712.37x = 21,682.76 × 8,638.79
  4. Step 4: Simplify right side
    15,712.37x = 187,312,658.65
  5. Step 5: Solve for x
    x = 187,312,658.65/15,712.37
  6. Step 6: Final answer
    x = 11,921.35

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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.