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Finding the Fourth Proportional to 18,283.40, 27,418.70 and 9,515.40

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Solution

The fourth proportional to 18,283.40, 27,418.70 and 9,515.40 is: 14,269.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,283.40 : 27,418.70 = 9,515.40 : x
  2. Step 2: Convert to fraction form
    18,283.40/27,418.70 = 9,515.40/x
  3. Step 3: Cross multiply
    18,283.40x = 27,418.70 × 9,515.40
  4. Step 4: Simplify right side
    18,283.40x = 260,899,897.98
  5. Step 5: Solve for x
    x = 260,899,897.98/18,283.40
  6. Step 6: Final answer
    x = 14,269.77

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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.