Home / 12,743.11-19,128.50-9,400.87

Finding the Fourth Proportional to 12,743.11, 19,128.50 and 9,400.87

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Solution

The fourth proportional to 12,743.11, 19,128.50 and 9,400.87 is: 14,111.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,743.11 : 19,128.50 = 9,400.87 : x
  2. Step 2: Convert to fraction form
    12,743.11/19,128.50 = 9,400.87/x
  3. Step 3: Cross multiply
    12,743.11x = 19,128.50 × 9,400.87
  4. Step 4: Simplify right side
    12,743.11x = 179,824,633.73
  5. Step 5: Solve for x
    x = 179,824,633.73/12,743.11
  6. Step 6: Final answer
    x = 14,111.52

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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.