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Finding the Fourth Proportional to 18,923.70, 28,397.70 and 11,026.20

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Solution

The fourth proportional to 18,923.70, 28,397.70 and 11,026.20 is: 16,546.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923.70 : 28,397.70 = 11,026.20 : x
  2. Step 2: Convert to fraction form
    18,923.70/28,397.70 = 11,026.20/x
  3. Step 3: Cross multiply
    18,923.70x = 28,397.70 × 11,026.20
  4. Step 4: Simplify right side
    18,923.70x = 313,118,719.74
  5. Step 5: Solve for x
    x = 313,118,719.74/18,923.70
  6. Step 6: Final answer
    x = 16,546.38

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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.