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Finding the Fourth Proportional to 18,795.84, 28,115.85 and 14,319.64

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Solution

The fourth proportional to 18,795.84, 28,115.85 and 14,319.64 is: 21,420.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,795.84 : 28,115.85 = 14,319.64 : x
  2. Step 2: Convert to fraction form
    18,795.84/28,115.85 = 14,319.64/x
  3. Step 3: Cross multiply
    18,795.84x = 28,115.85 × 14,319.64
  4. Step 4: Simplify right side
    18,795.84x = 402,608,708.41
  5. Step 5: Solve for x
    x = 402,608,708.41/18,795.84
  6. Step 6: Final answer
    x = 21,420.09

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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.