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Finding the Fourth Proportional to 18,290.70, 27,436.14 and 5,143.19

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Solution

The fourth proportional to 18,290.70, 27,436.14 and 5,143.19 is: 7,714.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,290.70 : 27,436.14 = 5,143.19 : x
  2. Step 2: Convert to fraction form
    18,290.70/27,436.14 = 5,143.19/x
  3. Step 3: Cross multiply
    18,290.70x = 27,436.14 × 5,143.19
  4. Step 4: Simplify right side
    18,290.70x = 141,109,143.71
  5. Step 5: Solve for x
    x = 141,109,143.71/18,290.70
  6. Step 6: Final answer
    x = 7,714.80

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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.