Home / 15,742.53-21,709.71-12,151.75

Finding the Fourth Proportional to 15,742.53, 21,709.71 and 12,151.75

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Solution

The fourth proportional to 15,742.53, 21,709.71 and 12,151.75 is: 16,757.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.53 : 21,709.71 = 12,151.75 : x
  2. Step 2: Convert to fraction form
    15,742.53/21,709.71 = 12,151.75/x
  3. Step 3: Cross multiply
    15,742.53x = 21,709.71 × 12,151.75
  4. Step 4: Simplify right side
    15,742.53x = 263,810,968.49
  5. Step 5: Solve for x
    x = 263,810,968.49/15,742.53
  6. Step 6: Final answer
    x = 16,757.85

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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.