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Finding the Fourth Proportional to 18,590.40, 27,812.70 and 16,840.80

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Solution

The fourth proportional to 18,590.40, 27,812.70 and 16,840.80 is: 25,195.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,590.40 : 27,812.70 = 16,840.80 : x
  2. Step 2: Convert to fraction form
    18,590.40/27,812.70 = 16,840.80/x
  3. Step 3: Cross multiply
    18,590.40x = 27,812.70 × 16,840.80
  4. Step 4: Simplify right side
    18,590.40x = 468,388,118.16
  5. Step 5: Solve for x
    x = 468,388,118.16/18,590.40
  6. Step 6: Final answer
    x = 25,195.16

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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.