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Finding the Fourth Proportional to 18,955.96, 28,432.90 and 5,808.32

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Solution

The fourth proportional to 18,955.96, 28,432.90 and 5,808.32 is: 8,712.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,955.96 : 28,432.90 = 5,808.32 : x
  2. Step 2: Convert to fraction form
    18,955.96/28,432.90 = 5,808.32/x
  3. Step 3: Cross multiply
    18,955.96x = 28,432.90 × 5,808.32
  4. Step 4: Simplify right side
    18,955.96x = 165,147,381.73
  5. Step 5: Solve for x
    x = 165,147,381.73/18,955.96
  6. Step 6: Final answer
    x = 8,712.16

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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.