Home / 20,790.18-28,690.34-11,358.68

Finding the Fourth Proportional to 20,790.18, 28,690.34 and 11,358.68

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Solution

The fourth proportional to 20,790.18, 28,690.34 and 11,358.68 is: 15,674.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.18 : 28,690.34 = 11,358.68 : x
  2. Step 2: Convert to fraction form
    20,790.18/28,690.34 = 11,358.68/x
  3. Step 3: Cross multiply
    20,790.18x = 28,690.34 × 11,358.68
  4. Step 4: Simplify right side
    20,790.18x = 325,884,190.91
  5. Step 5: Solve for x
    x = 325,884,190.91/20,790.18
  6. Step 6: Final answer
    x = 15,674.91

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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.