Home / 20,561.57-28,374.74-11,609.45

Finding the Fourth Proportional to 20,561.57, 28,374.74 and 11,609.45

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Solution

The fourth proportional to 20,561.57, 28,374.74 and 11,609.45 is: 16,020.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.57 : 28,374.74 = 11,609.45 : x
  2. Step 2: Convert to fraction form
    20,561.57/28,374.74 = 11,609.45/x
  3. Step 3: Cross multiply
    20,561.57x = 28,374.74 × 11,609.45
  4. Step 4: Simplify right side
    20,561.57x = 329,415,138.18
  5. Step 5: Solve for x
    x = 329,415,138.18/20,561.57
  6. Step 6: Final answer
    x = 16,020.91

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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.