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Finding the Fourth Proportional to 20,536.62, 30,804.93 and 8,687.32

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Solution

The fourth proportional to 20,536.62, 30,804.93 and 8,687.32 is: 13,030.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,536.62 : 30,804.93 = 8,687.32 : x
  2. Step 2: Convert to fraction form
    20,536.62/30,804.93 = 8,687.32/x
  3. Step 3: Cross multiply
    20,536.62x = 30,804.93 × 8,687.32
  4. Step 4: Simplify right side
    20,536.62x = 267,612,130.46
  5. Step 5: Solve for x
    x = 267,612,130.46/20,536.62
  6. Step 6: Final answer
    x = 13,030.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.