Home / 14,428.32-19,910.88-8,142.72

Finding the Fourth Proportional to 14,428.32, 19,910.88 and 8,142.72

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Solution

The fourth proportional to 14,428.32, 19,910.88 and 8,142.72 is: 11,236.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,428.32 : 19,910.88 = 8,142.72 : x
  2. Step 2: Convert to fraction form
    14,428.32/19,910.88 = 8,142.72/x
  3. Step 3: Cross multiply
    14,428.32x = 19,910.88 × 8,142.72
  4. Step 4: Simplify right side
    14,428.32x = 162,128,720.79
  5. Step 5: Solve for x
    x = 162,128,720.79/14,428.32
  6. Step 6: Final answer
    x = 11,236.84

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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.