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Finding the Fourth Proportional to 28,366.39, 42,556 and 9,390.99

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Solution

The fourth proportional to 28,366.39, 42,556 and 9,390.99 is: 14,088.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,366.39 : 42,556 = 9,390.99 : x
  2. Step 2: Convert to fraction form
    28,366.39/42,556 = 9,390.99/x
  3. Step 3: Cross multiply
    28,366.39x = 42,556 × 9,390.99
  4. Step 4: Simplify right side
    28,366.39x = 399,642,970.44
  5. Step 5: Solve for x
    x = 399,642,970.44/28,366.39
  6. Step 6: Final answer
    x = 14,088.61

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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.