Home / 12,058.32-18,121.68-7,128.84

Finding the Fourth Proportional to 12,058.32, 18,121.68 and 7,128.84

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Solution

The fourth proportional to 12,058.32, 18,121.68 and 7,128.84 is: 10,713.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,058.32 : 18,121.68 = 7,128.84 : x
  2. Step 2: Convert to fraction form
    12,058.32/18,121.68 = 7,128.84/x
  3. Step 3: Cross multiply
    12,058.32x = 18,121.68 × 7,128.84
  4. Step 4: Simplify right side
    12,058.32x = 129,186,557.25
  5. Step 5: Solve for x
    x = 129,186,557.25/12,058.32
  6. Step 6: Final answer
    x = 10,713.48

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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.