Home / 12,651.28-17,438.16-10,128.96

Finding the Fourth Proportional to 12,651.28, 17,438.16 and 10,128.96

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Solution

The fourth proportional to 12,651.28, 17,438.16 and 10,128.96 is: 13,961.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.28 : 17,438.16 = 10,128.96 : x
  2. Step 2: Convert to fraction form
    12,651.28/17,438.16 = 10,128.96/x
  3. Step 3: Cross multiply
    12,651.28x = 17,438.16 × 10,128.96
  4. Step 4: Simplify right side
    12,651.28x = 176,630,425.11
  5. Step 5: Solve for x
    x = 176,630,425.11/12,651.28
  6. Step 6: Final answer
    x = 13,961.47

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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.