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Finding the Fourth Proportional to 18,581.79, 25,650.87 and 11,412.87

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Solution

The fourth proportional to 18,581.79, 25,650.87 and 11,412.87 is: 15,754.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,581.79 : 25,650.87 = 11,412.87 : x
  2. Step 2: Convert to fraction form
    18,581.79/25,650.87 = 11,412.87/x
  3. Step 3: Cross multiply
    18,581.79x = 25,650.87 × 11,412.87
  4. Step 4: Simplify right side
    18,581.79x = 292,750,044.70
  5. Step 5: Solve for x
    x = 292,750,044.70/18,581.79
  6. Step 6: Final answer
    x = 15,754.67

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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.