Home / 30,289.76-45,415.20-19,889.36

Finding the Fourth Proportional to 30,289.76, 45,415.20 and 19,889.36

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Solution

The fourth proportional to 30,289.76, 45,415.20 and 19,889.36 is: 29,821.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,289.76 : 45,415.20 = 19,889.36 : x
  2. Step 2: Convert to fraction form
    30,289.76/45,415.20 = 19,889.36/x
  3. Step 3: Cross multiply
    30,289.76x = 45,415.20 × 19,889.36
  4. Step 4: Simplify right side
    30,289.76x = 903,279,262.27
  5. Step 5: Solve for x
    x = 903,279,262.27/30,289.76
  6. Step 6: Final answer
    x = 29,821.27

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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.