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Finding the Fourth Proportional to 14,382.40, 19,801.40 and 11,191.82

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Solution

The fourth proportional to 14,382.40, 19,801.40 and 11,191.82 is: 15,408.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,382.40 : 19,801.40 = 11,191.82 : x
  2. Step 2: Convert to fraction form
    14,382.40/19,801.40 = 11,191.82/x
  3. Step 3: Cross multiply
    14,382.40x = 19,801.40 × 11,191.82
  4. Step 4: Simplify right side
    14,382.40x = 221,613,704.55
  5. Step 5: Solve for x
    x = 221,613,704.55/14,382.40
  6. Step 6: Final answer
    x = 15,408.67

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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.