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Finding the Fourth Proportional to 12,689.46, 19,034.19 and 3,924.45

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Solution

The fourth proportional to 12,689.46, 19,034.19 and 3,924.45 is: 5,886.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.46 : 19,034.19 = 3,924.45 : x
  2. Step 2: Convert to fraction form
    12,689.46/19,034.19 = 3,924.45/x
  3. Step 3: Cross multiply
    12,689.46x = 19,034.19 × 3,924.45
  4. Step 4: Simplify right side
    12,689.46x = 74,698,726.95
  5. Step 5: Solve for x
    x = 74,698,726.95/12,689.46
  6. Step 6: Final answer
    x = 5,886.68

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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.