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Finding the Fourth Proportional to 18,830.06, 28,204.88 and 9,917.30

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Solution

The fourth proportional to 18,830.06, 28,204.88 and 9,917.30 is: 14,854.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,830.06 : 28,204.88 = 9,917.30 : x
  2. Step 2: Convert to fraction form
    18,830.06/28,204.88 = 9,917.30/x
  3. Step 3: Cross multiply
    18,830.06x = 28,204.88 × 9,917.30
  4. Step 4: Simplify right side
    18,830.06x = 279,716,256.42
  5. Step 5: Solve for x
    x = 279,716,256.42/18,830.06
  6. Step 6: Final answer
    x = 14,854.77

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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.