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Finding the Fourth Proportional to 18,478.72, 25,448.80 and 17,292.88

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Solution

The fourth proportional to 18,478.72, 25,448.80 and 17,292.88 is: 23,815.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.72 : 25,448.80 = 17,292.88 : x
  2. Step 2: Convert to fraction form
    18,478.72/25,448.80 = 17,292.88/x
  3. Step 3: Cross multiply
    18,478.72x = 25,448.80 × 17,292.88
  4. Step 4: Simplify right side
    18,478.72x = 440,083,044.54
  5. Step 5: Solve for x
    x = 440,083,044.54/18,478.72
  6. Step 6: Final answer
    x = 23,815.67

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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.