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Finding the Fourth Proportional to 28,476.35, 42,714.42 and 7,699.85

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Solution

The fourth proportional to 28,476.35, 42,714.42 and 7,699.85 is: 11,549.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,476.35 : 42,714.42 = 7,699.85 : x
  2. Step 2: Convert to fraction form
    28,476.35/42,714.42 = 7,699.85/x
  3. Step 3: Cross multiply
    28,476.35x = 42,714.42 × 7,699.85
  4. Step 4: Simplify right side
    28,476.35x = 328,894,626.84
  5. Step 5: Solve for x
    x = 328,894,626.84/28,476.35
  6. Step 6: Final answer
    x = 11,549.75

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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.