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Finding the Fourth Proportional to 18,415.34, 25,411.07 and 10,861.07

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Solution

The fourth proportional to 18,415.34, 25,411.07 and 10,861.07 is: 14,987.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,415.34 : 25,411.07 = 10,861.07 : x
  2. Step 2: Convert to fraction form
    18,415.34/25,411.07 = 10,861.07/x
  3. Step 3: Cross multiply
    18,415.34x = 25,411.07 × 10,861.07
  4. Step 4: Simplify right side
    18,415.34x = 275,991,228.68
  5. Step 5: Solve for x
    x = 275,991,228.68/18,415.34
  6. Step 6: Final answer
    x = 14,987.03

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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.