Home / 20,409.34-28,166.93-13,708.96

Finding the Fourth Proportional to 20,409.34, 28,166.93 and 13,708.96

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Solution

The fourth proportional to 20,409.34, 28,166.93 and 13,708.96 is: 18,919.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.34 : 28,166.93 = 13,708.96 : x
  2. Step 2: Convert to fraction form
    20,409.34/28,166.93 = 13,708.96/x
  3. Step 3: Cross multiply
    20,409.34x = 28,166.93 × 13,708.96
  4. Step 4: Simplify right side
    20,409.34x = 386,139,316.69
  5. Step 5: Solve for x
    x = 386,139,316.69/20,409.34
  6. Step 6: Final answer
    x = 18,919.74

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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.