Home / 20,871.42-31,285.26-9,768.75

Finding the Fourth Proportional to 20,871.42, 31,285.26 and 9,768.75

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Solution

The fourth proportional to 20,871.42, 31,285.26 and 9,768.75 is: 14,642.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.42 : 31,285.26 = 9,768.75 : x
  2. Step 2: Convert to fraction form
    20,871.42/31,285.26 = 9,768.75/x
  3. Step 3: Cross multiply
    20,871.42x = 31,285.26 × 9,768.75
  4. Step 4: Simplify right side
    20,871.42x = 305,617,883.63
  5. Step 5: Solve for x
    x = 305,617,883.63/20,871.42
  6. Step 6: Final answer
    x = 14,642.89

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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.