Home / 21,744.79-30,005.78-12,313.35

Finding the Fourth Proportional to 21,744.79, 30,005.78 and 12,313.35

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Solution

The fourth proportional to 21,744.79, 30,005.78 and 12,313.35 is: 16,991.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,744.79 : 30,005.78 = 12,313.35 : x
  2. Step 2: Convert to fraction form
    21,744.79/30,005.78 = 12,313.35/x
  3. Step 3: Cross multiply
    21,744.79x = 30,005.78 × 12,313.35
  4. Step 4: Simplify right side
    21,744.79x = 369,471,609.60
  5. Step 5: Solve for x
    x = 369,471,609.60/21,744.79
  6. Step 6: Final answer
    x = 16,991.27

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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.