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Finding the Fourth Proportional to 12,690.72, 19,035.72 and 4,901.22

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Solution

The fourth proportional to 12,690.72, 19,035.72 and 4,901.22 is: 7,351.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.72 : 19,035.72 = 4,901.22 : x
  2. Step 2: Convert to fraction form
    12,690.72/19,035.72 = 4,901.22/x
  3. Step 3: Cross multiply
    12,690.72x = 19,035.72 × 4,901.22
  4. Step 4: Simplify right side
    12,690.72x = 93,298,251.58
  5. Step 5: Solve for x
    x = 93,298,251.58/12,690.72
  6. Step 6: Final answer
    x = 7,351.69

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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.