Home / 28,359.96-42,499.62-20,905.80

Finding the Fourth Proportional to 28,359.96, 42,499.62 and 20,905.80

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Solution

The fourth proportional to 28,359.96, 42,499.62 and 20,905.80 is: 31,328.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.96 : 42,499.62 = 20,905.80 : x
  2. Step 2: Convert to fraction form
    28,359.96/42,499.62 = 20,905.80/x
  3. Step 3: Cross multiply
    28,359.96x = 42,499.62 × 20,905.80
  4. Step 4: Simplify right side
    28,359.96x = 888,488,555.80
  5. Step 5: Solve for x
    x = 888,488,555.80/28,359.96
  6. Step 6: Final answer
    x = 31,328.98

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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.