Home / 20,765.72-31,154.57-10,238.90

Finding the Fourth Proportional to 20,765.72, 31,154.57 and 10,238.90

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Solution

The fourth proportional to 20,765.72, 31,154.57 and 10,238.90 is: 15,361.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.72 : 31,154.57 = 10,238.90 : x
  2. Step 2: Convert to fraction form
    20,765.72/31,154.57 = 10,238.90/x
  3. Step 3: Cross multiply
    20,765.72x = 31,154.57 × 10,238.90
  4. Step 4: Simplify right side
    20,765.72x = 318,988,319.81
  5. Step 5: Solve for x
    x = 318,988,319.81/20,765.72
  6. Step 6: Final answer
    x = 15,361.30

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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.