Home / 12,128.13-18,252.95-10,920.42

Finding the Fourth Proportional to 12,128.13, 18,252.95 and 10,920.42

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Solution

The fourth proportional to 12,128.13, 18,252.95 and 10,920.42 is: 16,435.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.13 : 18,252.95 = 10,920.42 : x
  2. Step 2: Convert to fraction form
    12,128.13/18,252.95 = 10,920.42/x
  3. Step 3: Cross multiply
    12,128.13x = 18,252.95 × 10,920.42
  4. Step 4: Simplify right side
    12,128.13x = 199,329,825.64
  5. Step 5: Solve for x
    x = 199,329,825.64/12,128.13
  6. Step 6: Final answer
    x = 16,435.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.