Home / 13,275.09-18,318.76-7,972.83

Finding the Fourth Proportional to 13,275.09, 18,318.76 and 7,972.83

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Solution

The fourth proportional to 13,275.09, 18,318.76 and 7,972.83 is: 11,001.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,275.09 : 18,318.76 = 7,972.83 : x
  2. Step 2: Convert to fraction form
    13,275.09/18,318.76 = 7,972.83/x
  3. Step 3: Cross multiply
    13,275.09x = 18,318.76 × 7,972.83
  4. Step 4: Simplify right side
    13,275.09x = 146,052,339.36
  5. Step 5: Solve for x
    x = 146,052,339.36/13,275.09
  6. Step 6: Final answer
    x = 11,001.98

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Double scale
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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.