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Finding the Fourth Proportional to 18,798.57, 28,197.84 and 4,947.57

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Solution

The fourth proportional to 18,798.57, 28,197.84 and 4,947.57 is: 7,421.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,798.57 : 28,197.84 = 4,947.57 : x
  2. Step 2: Convert to fraction form
    18,798.57/28,197.84 = 4,947.57/x
  3. Step 3: Cross multiply
    18,798.57x = 28,197.84 × 4,947.57
  4. Step 4: Simplify right side
    18,798.57x = 139,510,787.25
  5. Step 5: Solve for x
    x = 139,510,787.25/18,798.57
  6. Step 6: Final answer
    x = 7,421.35

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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.