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Finding the Fourth Proportional to 18,764.66, 28,128.36 and 10,448.48

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Solution

The fourth proportional to 18,764.66, 28,128.36 and 10,448.48 is: 15,662.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,764.66 : 28,128.36 = 10,448.48 : x
  2. Step 2: Convert to fraction form
    18,764.66/28,128.36 = 10,448.48/x
  3. Step 3: Cross multiply
    18,764.66x = 28,128.36 × 10,448.48
  4. Step 4: Simplify right side
    18,764.66x = 293,898,606.89
  5. Step 5: Solve for x
    x = 293,898,606.89/18,764.66
  6. Step 6: Final answer
    x = 15,662.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.