Home / 18,117.90-27,171.09-6,428.34

Finding the Fourth Proportional to 18,117.90, 27,171.09 and 6,428.34

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Solution

The fourth proportional to 18,117.90, 27,171.09 and 6,428.34 is: 9,640.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,117.90 : 27,171.09 = 6,428.34 : x
  2. Step 2: Convert to fraction form
    18,117.90/27,171.09 = 6,428.34/x
  3. Step 3: Cross multiply
    18,117.90x = 27,171.09 × 6,428.34
  4. Step 4: Simplify right side
    18,117.90x = 174,665,004.69
  5. Step 5: Solve for x
    x = 174,665,004.69/18,117.90
  6. Step 6: Final answer
    x = 9,640.47

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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.