Home / 13,128.92-18,117.45-7,463.91

Finding the Fourth Proportional to 13,128.92, 18,117.45 and 7,463.91

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Solution

The fourth proportional to 13,128.92, 18,117.45 and 7,463.91 is: 10,299.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.92 : 18,117.45 = 7,463.91 : x
  2. Step 2: Convert to fraction form
    13,128.92/18,117.45 = 7,463.91/x
  3. Step 3: Cross multiply
    13,128.92x = 18,117.45 × 7,463.91
  4. Step 4: Simplify right side
    13,128.92x = 135,227,016.23
  5. Step 5: Solve for x
    x = 135,227,016.23/13,128.92
  6. Step 6: Final answer
    x = 10,299.94

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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.