Home / 28,500.80-42,755.88-8,779.36

Finding the Fourth Proportional to 28,500.80, 42,755.88 and 8,779.36

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Solution

The fourth proportional to 28,500.80, 42,755.88 and 8,779.36 is: 13,170.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,500.80 : 42,755.88 = 8,779.36 : x
  2. Step 2: Convert to fraction form
    28,500.80/42,755.88 = 8,779.36/x
  3. Step 3: Cross multiply
    28,500.80x = 42,755.88 × 8,779.36
  4. Step 4: Simplify right side
    28,500.80x = 375,369,262.64
  5. Step 5: Solve for x
    x = 375,369,262.64/28,500.80
  6. Step 6: Final answer
    x = 13,170.48

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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.