Home / 20,768.40-31,169.16-10,913.46

Finding the Fourth Proportional to 20,768.40, 31,169.16 and 10,913.46

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Solution

The fourth proportional to 20,768.40, 31,169.16 and 10,913.46 is: 16,378.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.40 : 31,169.16 = 10,913.46 : x
  2. Step 2: Convert to fraction form
    20,768.40/31,169.16 = 10,913.46/x
  3. Step 3: Cross multiply
    20,768.40x = 31,169.16 × 10,913.46
  4. Step 4: Simplify right side
    20,768.40x = 340,163,380.89
  5. Step 5: Solve for x
    x = 340,163,380.89/20,768.40
  6. Step 6: Final answer
    x = 16,378.89

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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.