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Finding the Fourth Proportional to 28,004.66, 42,004.68 and 9,278.58

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Solution

The fourth proportional to 28,004.66, 42,004.68 and 9,278.58 is: 13,917.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,004.66 : 42,004.68 = 9,278.58 : x
  2. Step 2: Convert to fraction form
    28,004.66/42,004.68 = 9,278.58/x
  3. Step 3: Cross multiply
    28,004.66x = 42,004.68 × 9,278.58
  4. Step 4: Simplify right side
    28,004.66x = 389,743,783.75
  5. Step 5: Solve for x
    x = 389,743,783.75/28,004.66
  6. Step 6: Final answer
    x = 13,917.10

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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.