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Finding the Fourth Proportional to 8,757.80, 12,085.80 and 4,779

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Solution

The fourth proportional to 8,757.80, 12,085.80 and 4,779 is: 6,595.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,757.80 : 12,085.80 = 4,779 : x
  2. Step 2: Convert to fraction form
    8,757.80/12,085.80 = 4,779/x
  3. Step 3: Cross multiply
    8,757.80x = 12,085.80 × 4,779
  4. Step 4: Simplify right side
    8,757.80x = 57,758,020.28
  5. Step 5: Solve for x
    x = 57,758,020.28/8,757.80
  6. Step 6: Final answer
    x = 6,595.04

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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.