Home / 21,960.51-30,302.87-12,399.67

Finding the Fourth Proportional to 21,960.51, 30,302.87 and 12,399.67

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Solution

The fourth proportional to 21,960.51, 30,302.87 and 12,399.67 is: 17,110.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960.51 : 30,302.87 = 12,399.67 : x
  2. Step 2: Convert to fraction form
    21,960.51/30,302.87 = 12,399.67/x
  3. Step 3: Cross multiply
    21,960.51x = 30,302.87 × 12,399.67
  4. Step 4: Simplify right side
    21,960.51x = 375,745,588.05
  5. Step 5: Solve for x
    x = 375,745,588.05/21,960.51
  6. Step 6: Final answer
    x = 17,110.06

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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.