Home / 18,128.16-25,018.08-12,169.76

Finding the Fourth Proportional to 18,128.16, 25,018.08 and 12,169.76

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Solution

The fourth proportional to 18,128.16, 25,018.08 and 12,169.76 is: 16,795.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.16 : 25,018.08 = 12,169.76 : x
  2. Step 2: Convert to fraction form
    18,128.16/25,018.08 = 12,169.76/x
  3. Step 3: Cross multiply
    18,128.16x = 25,018.08 × 12,169.76
  4. Step 4: Simplify right side
    18,128.16x = 304,464,029.26
  5. Step 5: Solve for x
    x = 304,464,029.26/18,128.16
  6. Step 6: Final answer
    x = 16,795.09

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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.