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Finding the Fourth Proportional to 18,539.64, 27,809.46 and 4,689.72

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Solution

The fourth proportional to 18,539.64, 27,809.46 and 4,689.72 is: 7,034.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,539.64 : 27,809.46 = 4,689.72 : x
  2. Step 2: Convert to fraction form
    18,539.64/27,809.46 = 4,689.72/x
  3. Step 3: Cross multiply
    18,539.64x = 27,809.46 × 4,689.72
  4. Step 4: Simplify right side
    18,539.64x = 130,418,580.75
  5. Step 5: Solve for x
    x = 130,418,580.75/18,539.64
  6. Step 6: Final answer
    x = 7,034.58

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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.