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Finding the Fourth Proportional to 18,491.01, 25,501.87 and 15,633.67

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Solution

The fourth proportional to 18,491.01, 25,501.87 and 15,633.67 is: 21,561.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.01 : 25,501.87 = 15,633.67 : x
  2. Step 2: Convert to fraction form
    18,491.01/25,501.87 = 15,633.67/x
  3. Step 3: Cross multiply
    18,491.01x = 25,501.87 × 15,633.67
  4. Step 4: Simplify right side
    18,491.01x = 398,687,819.96
  5. Step 5: Solve for x
    x = 398,687,819.96/18,491.01
  6. Step 6: Final answer
    x = 21,561.17

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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.