Home / 20,790.14-28,690.38-11,358.70

Finding the Fourth Proportional to 20,790.14, 28,690.38 and 11,358.70

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Solution

The fourth proportional to 20,790.14, 28,690.38 and 11,358.70 is: 15,675.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.14 : 28,690.38 = 11,358.70 : x
  2. Step 2: Convert to fraction form
    20,790.14/28,690.38 = 11,358.70/x
  3. Step 3: Cross multiply
    20,790.14x = 28,690.38 × 11,358.70
  4. Step 4: Simplify right side
    20,790.14x = 325,885,347.58
  5. Step 5: Solve for x
    x = 325,885,347.58/20,790.14
  6. Step 6: Final answer
    x = 15,675.00

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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.