Home / 20,317.80-28,055.85-12,776.73

Finding the Fourth Proportional to 20,317.80, 28,055.85 and 12,776.73

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Solution

The fourth proportional to 20,317.80, 28,055.85 and 12,776.73 is: 17,642.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,317.80 : 28,055.85 = 12,776.73 : x
  2. Step 2: Convert to fraction form
    20,317.80/28,055.85 = 12,776.73/x
  3. Step 3: Cross multiply
    20,317.80x = 28,055.85 × 12,776.73
  4. Step 4: Simplify right side
    20,317.80x = 358,462,020.37
  5. Step 5: Solve for x
    x = 358,462,020.37/20,317.80
  6. Step 6: Final answer
    x = 17,642.76

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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.