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Finding the Fourth Proportional to 18,615.68, 25,663.20 and 14,805.44

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Solution

The fourth proportional to 18,615.68, 25,663.20 and 14,805.44 is: 20,410.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615.68 : 25,663.20 = 14,805.44 : x
  2. Step 2: Convert to fraction form
    18,615.68/25,663.20 = 14,805.44/x
  3. Step 3: Cross multiply
    18,615.68x = 25,663.20 × 14,805.44
  4. Step 4: Simplify right side
    18,615.68x = 379,954,967.81
  5. Step 5: Solve for x
    x = 379,954,967.81/18,615.68
  6. Step 6: Final answer
    x = 20,410.48

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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.