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Finding the Fourth Proportional to 28,699.42, 39,613.02 and 18,627.28

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Solution

The fourth proportional to 28,699.42, 39,613.02 and 18,627.28 is: 25,710.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,699.42 : 39,613.02 = 18,627.28 : x
  2. Step 2: Convert to fraction form
    28,699.42/39,613.02 = 18,627.28/x
  3. Step 3: Cross multiply
    28,699.42x = 39,613.02 × 18,627.28
  4. Step 4: Simplify right side
    28,699.42x = 737,882,815.19
  5. Step 5: Solve for x
    x = 737,882,815.19/28,699.42
  6. Step 6: Final answer
    x = 25,710.72

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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.