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Finding the Fourth Proportional to 18,917.31, 28,393.47 and 9,563.93

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Solution

The fourth proportional to 18,917.31, 28,393.47 and 9,563.93 is: 14,354.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,917.31 : 28,393.47 = 9,563.93 : x
  2. Step 2: Convert to fraction form
    18,917.31/28,393.47 = 9,563.93/x
  3. Step 3: Cross multiply
    18,917.31x = 28,393.47 × 9,563.93
  4. Step 4: Simplify right side
    18,917.31x = 271,553,017.57
  5. Step 5: Solve for x
    x = 271,553,017.57/18,917.31
  6. Step 6: Final answer
    x = 14,354.74

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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.