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Finding the Fourth Proportional to 8,739.87, 12,065.04 and 5,153.64

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Solution

The fourth proportional to 8,739.87, 12,065.04 and 5,153.64 is: 7,114.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,739.87 : 12,065.04 = 5,153.64 : x
  2. Step 2: Convert to fraction form
    8,739.87/12,065.04 = 5,153.64/x
  3. Step 3: Cross multiply
    8,739.87x = 12,065.04 × 5,153.64
  4. Step 4: Simplify right side
    8,739.87x = 62,178,909.86
  5. Step 5: Solve for x
    x = 62,178,909.86/8,739.87
  6. Step 6: Final answer
    x = 7,114.40

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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.