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Finding the Fourth Proportional to 28,309.84, 42,464.86 and 8,588.57

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Solution

The fourth proportional to 28,309.84, 42,464.86 and 8,588.57 is: 12,882.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,309.84 : 42,464.86 = 8,588.57 : x
  2. Step 2: Convert to fraction form
    28,309.84/42,464.86 = 8,588.57/x
  3. Step 3: Cross multiply
    28,309.84x = 42,464.86 × 8,588.57
  4. Step 4: Simplify right side
    28,309.84x = 364,712,422.65
  5. Step 5: Solve for x
    x = 364,712,422.65/28,309.84
  6. Step 6: Final answer
    x = 12,882.89

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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.