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Finding the Fourth Proportional to 18,643.20, 27,916.20 and 14,722.80

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Solution

The fourth proportional to 18,643.20, 27,916.20 and 14,722.80 is: 22,045.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.20 : 27,916.20 = 14,722.80 : x
  2. Step 2: Convert to fraction form
    18,643.20/27,916.20 = 14,722.80/x
  3. Step 3: Cross multiply
    18,643.20x = 27,916.20 × 14,722.80
  4. Step 4: Simplify right side
    18,643.20x = 411,004,629.36
  5. Step 5: Solve for x
    x = 411,004,629.36/18,643.20
  6. Step 6: Final answer
    x = 22,045.82

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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.