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Finding the Fourth Proportional to 28,591.38, 42,878.87 and 9,866.56

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Solution

The fourth proportional to 28,591.38, 42,878.87 and 9,866.56 is: 14,797.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,591.38 : 42,878.87 = 9,866.56 : x
  2. Step 2: Convert to fraction form
    28,591.38/42,878.87 = 9,866.56/x
  3. Step 3: Cross multiply
    28,591.38x = 42,878.87 × 9,866.56
  4. Step 4: Simplify right side
    28,591.38x = 423,066,904.45
  5. Step 5: Solve for x
    x = 423,066,904.45/28,591.38
  6. Step 6: Final answer
    x = 14,797.01

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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.