Home / 20,974.87-28,945.53-11,543.65

Finding the Fourth Proportional to 20,974.87, 28,945.53 and 11,543.65

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Solution

The fourth proportional to 20,974.87, 28,945.53 and 11,543.65 is: 15,930.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,974.87 : 28,945.53 = 11,543.65 : x
  2. Step 2: Convert to fraction form
    20,974.87/28,945.53 = 11,543.65/x
  3. Step 3: Cross multiply
    20,974.87x = 28,945.53 × 11,543.65
  4. Step 4: Simplify right side
    20,974.87x = 334,137,009.67
  5. Step 5: Solve for x
    x = 334,137,009.67/20,974.87
  6. Step 6: Final answer
    x = 15,930.35

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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.