Home / 28,109.70-42,169.68-9,387.95

Finding the Fourth Proportional to 28,109.70, 42,169.68 and 9,387.95

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Solution

The fourth proportional to 28,109.70, 42,169.68 and 9,387.95 is: 14,083.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,109.70 : 42,169.68 = 9,387.95 : x
  2. Step 2: Convert to fraction form
    28,109.70/42,169.68 = 9,387.95/x
  3. Step 3: Cross multiply
    28,109.70x = 42,169.68 × 9,387.95
  4. Step 4: Simplify right side
    28,109.70x = 395,886,636.51
  5. Step 5: Solve for x
    x = 395,886,636.51/28,109.70
  6. Step 6: Final answer
    x = 14,083.63

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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.