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Finding the Fourth Proportional to 8,403.12, 12,619.44 and 7,160.04

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Solution

The fourth proportional to 8,403.12, 12,619.44 and 7,160.04 is: 10,752.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,403.12 : 12,619.44 = 7,160.04 : x
  2. Step 2: Convert to fraction form
    8,403.12/12,619.44 = 7,160.04/x
  3. Step 3: Cross multiply
    8,403.12x = 12,619.44 × 7,160.04
  4. Step 4: Simplify right side
    8,403.12x = 90,355,695.18
  5. Step 5: Solve for x
    x = 90,355,695.18/8,403.12
  6. Step 6: Final answer
    x = 10,752.64

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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.