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Finding the Fourth Proportional to 55,483.99, 83,234.28 and 20,420.98

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Solution

The fourth proportional to 55,483.99, 83,234.28 and 20,420.98 is: 30,634.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,483.99 : 83,234.28 = 20,420.98 : x
  2. Step 2: Convert to fraction form
    55,483.99/83,234.28 = 20,420.98/x
  3. Step 3: Cross multiply
    55,483.99x = 83,234.28 × 20,420.98
  4. Step 4: Simplify right side
    55,483.99x = 1,699,725,435.69
  5. Step 5: Solve for x
    x = 1,699,725,435.69/55,483.99
  6. Step 6: Final answer
    x = 30,634.52

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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.