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Finding the Fourth Proportional to 18,424.56, 25,430 and 11,708.88

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Solution

The fourth proportional to 18,424.56, 25,430 and 11,708.88 is: 16,160.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,424.56 : 25,430 = 11,708.88 : x
  2. Step 2: Convert to fraction form
    18,424.56/25,430 = 11,708.88/x
  3. Step 3: Cross multiply
    18,424.56x = 25,430 × 11,708.88
  4. Step 4: Simplify right side
    18,424.56x = 297,756,818.40
  5. Step 5: Solve for x
    x = 297,756,818.40/18,424.56
  6. Step 6: Final answer
    x = 16,160.86

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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.