Home / 20,900.96-31,329.52-9,798.32

Finding the Fourth Proportional to 20,900.96, 31,329.52 and 9,798.32

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Solution

The fourth proportional to 20,900.96, 31,329.52 and 9,798.32 is: 14,687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.96 : 31,329.52 = 9,798.32 : x
  2. Step 2: Convert to fraction form
    20,900.96/31,329.52 = 9,798.32/x
  3. Step 3: Cross multiply
    20,900.96x = 31,329.52 × 9,798.32
  4. Step 4: Simplify right side
    20,900.96x = 306,976,662.41
  5. Step 5: Solve for x
    x = 306,976,662.41/20,900.96
  6. Step 6: Final answer
    x = 14,687.20

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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.