Home / 13,630.40-18,805.92-9,661.76

Finding the Fourth Proportional to 13,630.40, 18,805.92 and 9,661.76

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Solution

The fourth proportional to 13,630.40, 18,805.92 and 9,661.76 is: 13,330.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.40 : 18,805.92 = 9,661.76 : x
  2. Step 2: Convert to fraction form
    13,630.40/18,805.92 = 9,661.76/x
  3. Step 3: Cross multiply
    13,630.40x = 18,805.92 × 9,661.76
  4. Step 4: Simplify right side
    13,630.40x = 181,698,285.62
  5. Step 5: Solve for x
    x = 181,698,285.62/13,630.40
  6. Step 6: Final answer
    x = 13,330.37

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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.