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Finding the Fourth Proportional to 14,359.71, 21,540.74 and 3,971.46

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Solution

The fourth proportional to 14,359.71, 21,540.74 and 3,971.46 is: 5,957.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,359.71 : 21,540.74 = 3,971.46 : x
  2. Step 2: Convert to fraction form
    14,359.71/21,540.74 = 3,971.46/x
  3. Step 3: Cross multiply
    14,359.71x = 21,540.74 × 3,971.46
  4. Step 4: Simplify right side
    14,359.71x = 85,548,167.42
  5. Step 5: Solve for x
    x = 85,548,167.42/14,359.71
  6. Step 6: Final answer
    x = 5,957.51

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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.