Home / 15,742.57-21,708.41-12,158.11

Finding the Fourth Proportional to 15,742.57, 21,708.41 and 12,158.11

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Solution

The fourth proportional to 15,742.57, 21,708.41 and 12,158.11 is: 16,765.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.57 : 21,708.41 = 12,158.11 : x
  2. Step 2: Convert to fraction form
    15,742.57/21,708.41 = 12,158.11/x
  3. Step 3: Cross multiply
    15,742.57x = 21,708.41 × 12,158.11
  4. Step 4: Simplify right side
    15,742.57x = 263,933,173.14
  5. Step 5: Solve for x
    x = 263,933,173.14/15,742.57
  6. Step 6: Final answer
    x = 16,765.58

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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.