Home / 20,697.12-28,568.16-12,633.84

Finding the Fourth Proportional to 20,697.12, 28,568.16 and 12,633.84

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Solution

The fourth proportional to 20,697.12, 28,568.16 and 12,633.84 is: 17,438.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.12 : 28,568.16 = 12,633.84 : x
  2. Step 2: Convert to fraction form
    20,697.12/28,568.16 = 12,633.84/x
  3. Step 3: Cross multiply
    20,697.12x = 28,568.16 × 12,633.84
  4. Step 4: Simplify right side
    20,697.12x = 360,925,562.53
  5. Step 5: Solve for x
    x = 360,925,562.53/20,697.12
  6. Step 6: Final answer
    x = 17,438.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.