Home / 19,890.80-27,449.30-10,938.90

Finding the Fourth Proportional to 19,890.80, 27,449.30 and 10,938.90

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Solution

The fourth proportional to 19,890.80, 27,449.30 and 10,938.90 is: 15,095.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.80 : 27,449.30 = 10,938.90 : x
  2. Step 2: Convert to fraction form
    19,890.80/27,449.30 = 10,938.90/x
  3. Step 3: Cross multiply
    19,890.80x = 27,449.30 × 10,938.90
  4. Step 4: Simplify right side
    19,890.80x = 300,265,093.08
  5. Step 5: Solve for x
    x = 300,265,093.08/19,890.80
  6. Step 6: Final answer
    x = 15,095.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.