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Finding the Fourth Proportional to 12,913.28, 19,369.92 and 9,025.28

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Solution

The fourth proportional to 12,913.28, 19,369.92 and 9,025.28 is: 13,537.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,913.28 : 19,369.92 = 9,025.28 : x
  2. Step 2: Convert to fraction form
    12,913.28/19,369.92 = 9,025.28/x
  3. Step 3: Cross multiply
    12,913.28x = 19,369.92 × 9,025.28
  4. Step 4: Simplify right side
    12,913.28x = 174,818,951.58
  5. Step 5: Solve for x
    x = 174,818,951.58/12,913.28
  6. Step 6: Final answer
    x = 13,537.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.