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Finding the Fourth Proportional to 13,891.65, 20,822.90 and 9,993.93

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Solution

The fourth proportional to 13,891.65, 20,822.90 and 9,993.93 is: 14,980.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,891.65 : 20,822.90 = 9,993.93 : x
  2. Step 2: Convert to fraction form
    13,891.65/20,822.90 = 9,993.93/x
  3. Step 3: Cross multiply
    13,891.65x = 20,822.90 × 9,993.93
  4. Step 4: Simplify right side
    13,891.65x = 208,102,555.03
  5. Step 5: Solve for x
    x = 208,102,555.03/13,891.65
  6. Step 6: Final answer
    x = 14,980.41

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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.