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Finding the Fourth Proportional to 18,687.64, 28,038.92 and 7,595.19

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Solution

The fourth proportional to 18,687.64, 28,038.92 and 7,595.19 is: 11,395.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.64 : 28,038.92 = 7,595.19 : x
  2. Step 2: Convert to fraction form
    18,687.64/28,038.92 = 7,595.19/x
  3. Step 3: Cross multiply
    18,687.64x = 28,038.92 × 7,595.19
  4. Step 4: Simplify right side
    18,687.64x = 212,960,975.90
  5. Step 5: Solve for x
    x = 212,960,975.90/18,687.64
  6. Step 6: Final answer
    x = 11,395.82

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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.