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Finding the Fourth Proportional to 19,384.20, 28,921.21 and 17,279.28

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Solution

The fourth proportional to 19,384.20, 28,921.21 and 17,279.28 is: 25,780.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,384.20 : 28,921.21 = 17,279.28 : x
  2. Step 2: Convert to fraction form
    19,384.20/28,921.21 = 17,279.28/x
  3. Step 3: Cross multiply
    19,384.20x = 28,921.21 × 17,279.28
  4. Step 4: Simplify right side
    19,384.20x = 499,737,642.33
  5. Step 5: Solve for x
    x = 499,737,642.33/19,384.20
  6. Step 6: Final answer
    x = 25,780.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.