Home / 19,245.15-28,815.59-9,991.71

Finding the Fourth Proportional to 19,245.15, 28,815.59 and 9,991.71

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Solution

The fourth proportional to 19,245.15, 28,815.59 and 9,991.71 is: 14,960.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,245.15 : 28,815.59 = 9,991.71 : x
  2. Step 2: Convert to fraction form
    19,245.15/28,815.59 = 9,991.71/x
  3. Step 3: Cross multiply
    19,245.15x = 28,815.59 × 9,991.71
  4. Step 4: Simplify right side
    19,245.15x = 287,916,968.80
  5. Step 5: Solve for x
    x = 287,916,968.80/19,245.15
  6. Step 6: Final answer
    x = 14,960.49

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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.