Home / 12,142.14-16,749.81-7,664.28

Finding the Fourth Proportional to 12,142.14, 16,749.81 and 7,664.28

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Solution

The fourth proportional to 12,142.14, 16,749.81 and 7,664.28 is: 10,572.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,142.14 : 16,749.81 = 7,664.28 : x
  2. Step 2: Convert to fraction form
    12,142.14/16,749.81 = 7,664.28/x
  3. Step 3: Cross multiply
    12,142.14x = 16,749.81 × 7,664.28
  4. Step 4: Simplify right side
    12,142.14x = 128,375,233.79
  5. Step 5: Solve for x
    x = 128,375,233.79/12,142.14
  6. Step 6: Final answer
    x = 10,572.70

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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.