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Finding the Fourth Proportional to 18,710.79, 25,820.91 and 10,327.29

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Solution

The fourth proportional to 18,710.79, 25,820.91 and 10,327.29 is: 14,251.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.79 : 25,820.91 = 10,327.29 : x
  2. Step 2: Convert to fraction form
    18,710.79/25,820.91 = 10,327.29/x
  3. Step 3: Cross multiply
    18,710.79x = 25,820.91 × 10,327.29
  4. Step 4: Simplify right side
    18,710.79x = 266,660,025.63
  5. Step 5: Solve for x
    x = 266,660,025.63/18,710.79
  6. Step 6: Final answer
    x = 14,251.67

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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.