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Finding the Fourth Proportional to 28,855.46, 43,284.47 and 9,135.47

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Solution

The fourth proportional to 28,855.46, 43,284.47 and 9,135.47 is: 13,703.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,855.46 : 43,284.47 = 9,135.47 : x
  2. Step 2: Convert to fraction form
    28,855.46/43,284.47 = 9,135.47/x
  3. Step 3: Cross multiply
    28,855.46x = 43,284.47 × 9,135.47
  4. Step 4: Simplify right side
    28,855.46x = 395,423,715.05
  5. Step 5: Solve for x
    x = 395,423,715.05/28,855.46
  6. Step 6: Final answer
    x = 13,703.60

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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.