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Finding the Fourth Proportional to 15,165.81, 20,928.87 and 8,793.65

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Solution

The fourth proportional to 15,165.81, 20,928.87 and 8,793.65 is: 12,135.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,165.81 : 20,928.87 = 8,793.65 : x
  2. Step 2: Convert to fraction form
    15,165.81/20,928.87 = 8,793.65/x
  3. Step 3: Cross multiply
    15,165.81x = 20,928.87 × 8,793.65
  4. Step 4: Simplify right side
    15,165.81x = 184,041,113.71
  5. Step 5: Solve for x
    x = 184,041,113.71/15,165.81
  6. Step 6: Final answer
    x = 12,135.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.