Home / 12,128.82-18,169.14-9,345.84

Finding the Fourth Proportional to 12,128.82, 18,169.14 and 9,345.84

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Solution

The fourth proportional to 12,128.82, 18,169.14 and 9,345.84 is: 14,000.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.82 : 18,169.14 = 9,345.84 : x
  2. Step 2: Convert to fraction form
    12,128.82/18,169.14 = 9,345.84/x
  3. Step 3: Cross multiply
    12,128.82x = 18,169.14 × 9,345.84
  4. Step 4: Simplify right side
    12,128.82x = 169,805,875.38
  5. Step 5: Solve for x
    x = 169,805,875.38/12,128.82
  6. Step 6: Final answer
    x = 14,000.20

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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.