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Finding the Fourth Proportional to 18,963.64, 28,445.48 and 5,814.28

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Solution

The fourth proportional to 18,963.64, 28,445.48 and 5,814.28 is: 8,721.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,963.64 : 28,445.48 = 5,814.28 : x
  2. Step 2: Convert to fraction form
    18,963.64/28,445.48 = 5,814.28/x
  3. Step 3: Cross multiply
    18,963.64x = 28,445.48 × 5,814.28
  4. Step 4: Simplify right side
    18,963.64x = 165,389,985.45
  5. Step 5: Solve for x
    x = 165,389,985.45/18,963.64
  6. Step 6: Final answer
    x = 8,721.43

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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.