Home / 13,931.12-20,900.28-5,168.54

Finding the Fourth Proportional to 13,931.12, 20,900.28 and 5,168.54

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Solution

The fourth proportional to 13,931.12, 20,900.28 and 5,168.54 is: 7,754.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.12 : 20,900.28 = 5,168.54 : x
  2. Step 2: Convert to fraction form
    13,931.12/20,900.28 = 5,168.54/x
  3. Step 3: Cross multiply
    13,931.12x = 20,900.28 × 5,168.54
  4. Step 4: Simplify right side
    13,931.12x = 108,023,933.19
  5. Step 5: Solve for x
    x = 108,023,933.19/13,931.12
  6. Step 6: Final answer
    x = 7,754.15

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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.