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Finding the Fourth Proportional to 18,558.70, 27,831.13 and 7,461.65

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Solution

The fourth proportional to 18,558.70, 27,831.13 and 7,461.65 is: 11,189.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,558.70 : 27,831.13 = 7,461.65 : x
  2. Step 2: Convert to fraction form
    18,558.70/27,831.13 = 7,461.65/x
  3. Step 3: Cross multiply
    18,558.70x = 27,831.13 × 7,461.65
  4. Step 4: Simplify right side
    18,558.70x = 207,666,151.16
  5. Step 5: Solve for x
    x = 207,666,151.16/18,558.70
  6. Step 6: Final answer
    x = 11,189.69

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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.