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Finding the Fourth Proportional to 18,867.98, 28,302.03 and 5,720.46

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Solution

The fourth proportional to 18,867.98, 28,302.03 and 5,720.46 is: 8,580.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,867.98 : 28,302.03 = 5,720.46 : x
  2. Step 2: Convert to fraction form
    18,867.98/28,302.03 = 5,720.46/x
  3. Step 3: Cross multiply
    18,867.98x = 28,302.03 × 5,720.46
  4. Step 4: Simplify right side
    18,867.98x = 161,900,630.53
  5. Step 5: Solve for x
    x = 161,900,630.53/18,867.98
  6. Step 6: Final answer
    x = 8,580.71

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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.