Home / 12,891.12-19,339.10-4,123.68

Finding the Fourth Proportional to 12,891.12, 19,339.10 and 4,123.68

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Solution

The fourth proportional to 12,891.12, 19,339.10 and 4,123.68 is: 6,186.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.12 : 19,339.10 = 4,123.68 : x
  2. Step 2: Convert to fraction form
    12,891.12/19,339.10 = 4,123.68/x
  3. Step 3: Cross multiply
    12,891.12x = 19,339.10 × 4,123.68
  4. Step 4: Simplify right side
    12,891.12x = 79,748,259.89
  5. Step 5: Solve for x
    x = 79,748,259.89/12,891.12
  6. Step 6: Final answer
    x = 6,186.29

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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.