Home / 13,140-18,081.36-9,983.52

Finding the Fourth Proportional to 13,140, 18,081.36 and 9,983.52

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Solution

The fourth proportional to 13,140, 18,081.36 and 9,983.52 is: 13,737.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140 : 18,081.36 = 9,983.52 : x
  2. Step 2: Convert to fraction form
    13,140/18,081.36 = 9,983.52/x
  3. Step 3: Cross multiply
    13,140x = 18,081.36 × 9,983.52
  4. Step 4: Simplify right side
    13,140x = 180,515,619.19
  5. Step 5: Solve for x
    x = 180,515,619.19/13,140
  6. Step 6: Final answer
    x = 13,737.87

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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.