Home / 20,960.76-28,925.01-11,400.65

Finding the Fourth Proportional to 20,960.76, 28,925.01 and 11,400.65

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Solution

The fourth proportional to 20,960.76, 28,925.01 and 11,400.65 is: 15,732.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.76 : 28,925.01 = 11,400.65 : x
  2. Step 2: Convert to fraction form
    20,960.76/28,925.01 = 11,400.65/x
  3. Step 3: Cross multiply
    20,960.76x = 28,925.01 × 11,400.65
  4. Step 4: Simplify right side
    20,960.76x = 329,763,900.03
  5. Step 5: Solve for x
    x = 329,763,900.03/20,960.76
  6. Step 6: Final answer
    x = 15,732.44

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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.