Home / 20,407.80-30,611.70-18,111.45

Finding the Fourth Proportional to 20,407.80, 30,611.70 and 18,111.45

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Solution

The fourth proportional to 20,407.80, 30,611.70 and 18,111.45 is: 27,167.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.80 : 30,611.70 = 18,111.45 : x
  2. Step 2: Convert to fraction form
    20,407.80/30,611.70 = 18,111.45/x
  3. Step 3: Cross multiply
    20,407.80x = 30,611.70 × 18,111.45
  4. Step 4: Simplify right side
    20,407.80x = 554,422,273.97
  5. Step 5: Solve for x
    x = 554,422,273.97/20,407.80
  6. Step 6: Final answer
    x = 27,167.18

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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.