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Finding the Fourth Proportional to 12,700.45, 19,049.45 and 4,379.32

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Solution

The fourth proportional to 12,700.45, 19,049.45 and 4,379.32 is: 6,568.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,700.45 : 19,049.45 = 4,379.32 : x
  2. Step 2: Convert to fraction form
    12,700.45/19,049.45 = 4,379.32/x
  3. Step 3: Cross multiply
    12,700.45x = 19,049.45 × 4,379.32
  4. Step 4: Simplify right side
    12,700.45x = 83,423,569.09
  5. Step 5: Solve for x
    x = 83,423,569.09/12,700.45
  6. Step 6: Final answer
    x = 6,568.55

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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.