Home / 20,673.20-31,009.80-10,305.20

Finding the Fourth Proportional to 20,673.20, 31,009.80 and 10,305.20

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Solution

The fourth proportional to 20,673.20, 31,009.80 and 10,305.20 is: 15,457.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.20 : 31,009.80 = 10,305.20 : x
  2. Step 2: Convert to fraction form
    20,673.20/31,009.80 = 10,305.20/x
  3. Step 3: Cross multiply
    20,673.20x = 31,009.80 × 10,305.20
  4. Step 4: Simplify right side
    20,673.20x = 319,562,190.96
  5. Step 5: Solve for x
    x = 319,562,190.96/20,673.20
  6. Step 6: Final answer
    x = 15,457.80

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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.