Home / 20,879.45-31,329.47-9,784.22

Finding the Fourth Proportional to 20,879.45, 31,329.47 and 9,784.22

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Solution

The fourth proportional to 20,879.45, 31,329.47 and 9,784.22 is: 14,681.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.45 : 31,329.47 = 9,784.22 : x
  2. Step 2: Convert to fraction form
    20,879.45/31,329.47 = 9,784.22/x
  3. Step 3: Cross multiply
    20,879.45x = 31,329.47 × 9,784.22
  4. Step 4: Simplify right side
    20,879.45x = 306,534,426.96
  5. Step 5: Solve for x
    x = 306,534,426.96/20,879.45
  6. Step 6: Final answer
    x = 14,681.15

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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.