Home / 28,515.86-42,778.64-8,790.74

Finding the Fourth Proportional to 28,515.86, 42,778.64 and 8,790.74

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Solution

The fourth proportional to 28,515.86, 42,778.64 and 8,790.74 is: 13,187.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.86 : 42,778.64 = 8,790.74 : x
  2. Step 2: Convert to fraction form
    28,515.86/42,778.64 = 8,790.74/x
  3. Step 3: Cross multiply
    28,515.86x = 42,778.64 × 8,790.74
  4. Step 4: Simplify right side
    28,515.86x = 376,055,709.88
  5. Step 5: Solve for x
    x = 376,055,709.88/28,515.86
  6. Step 6: Final answer
    x = 13,187.60

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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.