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Finding the Fourth Proportional to 19,078.88, 28,617.88 and 5,039.90

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Solution

The fourth proportional to 19,078.88, 28,617.88 and 5,039.90 is: 7,559.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,078.88 : 28,617.88 = 5,039.90 : x
  2. Step 2: Convert to fraction form
    19,078.88/28,617.88 = 5,039.90/x
  3. Step 3: Cross multiply
    19,078.88x = 28,617.88 × 5,039.90
  4. Step 4: Simplify right side
    19,078.88x = 144,231,085.12
  5. Step 5: Solve for x
    x = 144,231,085.12/19,078.88
  6. Step 6: Final answer
    x = 7,559.72

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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.