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Finding the Fourth Proportional to 8,779.14, 12,090.60 and 8,751.78

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Solution

The fourth proportional to 8,779.14, 12,090.60 and 8,751.78 is: 12,052.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779.14 : 12,090.60 = 8,751.78 : x
  2. Step 2: Convert to fraction form
    8,779.14/12,090.60 = 8,751.78/x
  3. Step 3: Cross multiply
    8,779.14x = 12,090.60 × 8,751.78
  4. Step 4: Simplify right side
    8,779.14x = 105,814,271.27
  5. Step 5: Solve for x
    x = 105,814,271.27/8,779.14
  6. Step 6: Final answer
    x = 12,052.92

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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.