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Finding the Fourth Proportional to 28,347.69, 42,521.94 and 9,879.69

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Solution

The fourth proportional to 28,347.69, 42,521.94 and 9,879.69 is: 14,819.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,347.69 : 42,521.94 = 9,879.69 : x
  2. Step 2: Convert to fraction form
    28,347.69/42,521.94 = 9,879.69/x
  3. Step 3: Cross multiply
    28,347.69x = 42,521.94 × 9,879.69
  4. Step 4: Simplify right side
    28,347.69x = 420,103,585.40
  5. Step 5: Solve for x
    x = 420,103,585.40/28,347.69
  6. Step 6: Final answer
    x = 14,819.68

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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.