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Finding the Fourth Proportional to 14,987.71, 20,684.19 and 8,274.63

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Solution

The fourth proportional to 14,987.71, 20,684.19 and 8,274.63 is: 11,419.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987.71 : 20,684.19 = 8,274.63 : x
  2. Step 2: Convert to fraction form
    14,987.71/20,684.19 = 8,274.63/x
  3. Step 3: Cross multiply
    14,987.71x = 20,684.19 × 8,274.63
  4. Step 4: Simplify right side
    14,987.71x = 171,153,977.73
  5. Step 5: Solve for x
    x = 171,153,977.73/14,987.71
  6. Step 6: Final answer
    x = 11,419.62

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Double scale
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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.