Home / 20,790.10-28,690.32-11,358.66

Finding the Fourth Proportional to 20,790.10, 28,690.32 and 11,358.66

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Solution

The fourth proportional to 20,790.10, 28,690.32 and 11,358.66 is: 15,674.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.10 : 28,690.32 = 11,358.66 : x
  2. Step 2: Convert to fraction form
    20,790.10/28,690.32 = 11,358.66/x
  3. Step 3: Cross multiply
    20,790.10x = 28,690.32 × 11,358.66
  4. Step 4: Simplify right side
    20,790.10x = 325,883,590.17
  5. Step 5: Solve for x
    x = 325,883,590.17/20,790.10
  6. Step 6: Final answer
    x = 15,674.94

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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.