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Finding the Fourth Proportional to 14,405.40, 19,879.36 and 8,031.91

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Solution

The fourth proportional to 14,405.40, 19,879.36 and 8,031.91 is: 11,083.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,405.40 : 19,879.36 = 8,031.91 : x
  2. Step 2: Convert to fraction form
    14,405.40/19,879.36 = 8,031.91/x
  3. Step 3: Cross multiply
    14,405.40x = 19,879.36 × 8,031.91
  4. Step 4: Simplify right side
    14,405.40x = 159,669,230.38
  5. Step 5: Solve for x
    x = 159,669,230.38/14,405.40
  6. Step 6: Final answer
    x = 11,083.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.