Home / 15,638.44-21,579-8,923.66

Finding the Fourth Proportional to 15,638.44, 21,579 and 8,923.66

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Solution

The fourth proportional to 15,638.44, 21,579 and 8,923.66 is: 12,313.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,638.44 : 21,579 = 8,923.66 : x
  2. Step 2: Convert to fraction form
    15,638.44/21,579 = 8,923.66/x
  3. Step 3: Cross multiply
    15,638.44x = 21,579 × 8,923.66
  4. Step 4: Simplify right side
    15,638.44x = 192,563,659.14
  5. Step 5: Solve for x
    x = 192,563,659.14/15,638.44
  6. Step 6: Final answer
    x = 12,313.48

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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.