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Finding the Fourth Proportional to 18,980.48, 28,472.80 and 11,632.16

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Solution

The fourth proportional to 18,980.48, 28,472.80 and 11,632.16 is: 17,449.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.48 : 28,472.80 = 11,632.16 : x
  2. Step 2: Convert to fraction form
    18,980.48/28,472.80 = 11,632.16/x
  3. Step 3: Cross multiply
    18,980.48x = 28,472.80 × 11,632.16
  4. Step 4: Simplify right side
    18,980.48x = 331,200,207.35
  5. Step 5: Solve for x
    x = 331,200,207.35/18,980.48
  6. Step 6: Final answer
    x = 17,449.51

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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.