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Finding the Fourth Proportional to 12,690.61, 19,037.19 and 4,369.53

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Solution

The fourth proportional to 12,690.61, 19,037.19 and 4,369.53 is: 6,554.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.61 : 19,037.19 = 4,369.53 : x
  2. Step 2: Convert to fraction form
    12,690.61/19,037.19 = 4,369.53/x
  3. Step 3: Cross multiply
    12,690.61x = 19,037.19 × 4,369.53
  4. Step 4: Simplify right side
    12,690.61x = 83,183,572.82
  5. Step 5: Solve for x
    x = 83,183,572.82/12,690.61
  6. Step 6: Final answer
    x = 6,554.73

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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.