Home / 20,804.16-28,710.04-11,372.72

Finding the Fourth Proportional to 20,804.16, 28,710.04 and 11,372.72

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Solution

The fourth proportional to 20,804.16, 28,710.04 and 11,372.72 is: 15,694.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.16 : 28,710.04 = 11,372.72 : x
  2. Step 2: Convert to fraction form
    20,804.16/28,710.04 = 11,372.72/x
  3. Step 3: Cross multiply
    20,804.16x = 28,710.04 × 11,372.72
  4. Step 4: Simplify right side
    20,804.16x = 326,511,246.11
  5. Step 5: Solve for x
    x = 326,511,246.11/20,804.16
  6. Step 6: Final answer
    x = 15,694.52

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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.