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Finding the Fourth Proportional to 18,745.59, 28,117.77 and 4,894.59

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Solution

The fourth proportional to 18,745.59, 28,117.77 and 4,894.59 is: 7,341.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,745.59 : 28,117.77 = 4,894.59 : x
  2. Step 2: Convert to fraction form
    18,745.59/28,117.77 = 4,894.59/x
  3. Step 3: Cross multiply
    18,745.59x = 28,117.77 × 4,894.59
  4. Step 4: Simplify right side
    18,745.59x = 137,624,815.28
  5. Step 5: Solve for x
    x = 137,624,815.28/18,745.59
  6. Step 6: Final answer
    x = 7,341.72

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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.