Home / 20,903.62-28,776.65-18,109.80

Finding the Fourth Proportional to 20,903.62, 28,776.65 and 18,109.80

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Solution

The fourth proportional to 20,903.62, 28,776.65 and 18,109.80 is: 24,930.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.62 : 28,776.65 = 18,109.80 : x
  2. Step 2: Convert to fraction form
    20,903.62/28,776.65 = 18,109.80/x
  3. Step 3: Cross multiply
    20,903.62x = 28,776.65 × 18,109.80
  4. Step 4: Simplify right side
    20,903.62x = 521,139,277.56
  5. Step 5: Solve for x
    x = 521,139,277.56/20,903.62
  6. Step 6: Final answer
    x = 24,930.58

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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.