Home / 12,434.79-17,154.62-7,128.39

Finding the Fourth Proportional to 12,434.79, 17,154.62 and 7,128.39

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Solution

The fourth proportional to 12,434.79, 17,154.62 and 7,128.39 is: 9,834.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,434.79 : 17,154.62 = 7,128.39 : x
  2. Step 2: Convert to fraction form
    12,434.79/17,154.62 = 7,128.39/x
  3. Step 3: Cross multiply
    12,434.79x = 17,154.62 × 7,128.39
  4. Step 4: Simplify right side
    12,434.79x = 122,284,786.02
  5. Step 5: Solve for x
    x = 122,284,786.02/12,434.79
  6. Step 6: Final answer
    x = 9,834.09

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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.