Home / 20,605.68-28,555.56-20,211.84

Finding the Fourth Proportional to 20,605.68, 28,555.56 and 20,211.84

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Solution

The fourth proportional to 20,605.68, 28,555.56 and 20,211.84 is: 28,009.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.68 : 28,555.56 = 20,211.84 : x
  2. Step 2: Convert to fraction form
    20,605.68/28,555.56 = 20,211.84/x
  3. Step 3: Cross multiply
    20,605.68x = 28,555.56 × 20,211.84
  4. Step 4: Simplify right side
    20,605.68x = 577,160,409.83
  5. Step 5: Solve for x
    x = 577,160,409.83/20,605.68
  6. Step 6: Final answer
    x = 28,009.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.