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Finding the Fourth Proportional to 14,987.46, 20,683.84 and 8,274.38

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Solution

The fourth proportional to 14,987.46, 20,683.84 and 8,274.38 is: 11,419.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987.46 : 20,683.84 = 8,274.38 : x
  2. Step 2: Convert to fraction form
    14,987.46/20,683.84 = 8,274.38/x
  3. Step 3: Cross multiply
    14,987.46x = 20,683.84 × 8,274.38
  4. Step 4: Simplify right side
    14,987.46x = 171,145,952.02
  5. Step 5: Solve for x
    x = 171,145,952.02/14,987.46
  6. Step 6: Final answer
    x = 11,419.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.