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Finding the Fourth Proportional to 28,409.23, 42,613.80 and 8,687.80

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Solution

The fourth proportional to 28,409.23, 42,613.80 and 8,687.80 is: 13,031.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.23 : 42,613.80 = 8,687.80 : x
  2. Step 2: Convert to fraction form
    28,409.23/42,613.80 = 8,687.80/x
  3. Step 3: Cross multiply
    28,409.23x = 42,613.80 × 8,687.80
  4. Step 4: Simplify right side
    28,409.23x = 370,220,171.64
  5. Step 5: Solve for x
    x = 370,220,171.64/28,409.23
  6. Step 6: Final answer
    x = 13,031.69

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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.