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Finding the Fourth Proportional to 8,659.29, 12,998.16 and 8,345.60

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Solution

The fourth proportional to 8,659.29, 12,998.16 and 8,345.60 is: 12,527.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.29 : 12,998.16 = 8,345.60 : x
  2. Step 2: Convert to fraction form
    8,659.29/12,998.16 = 8,345.60/x
  3. Step 3: Cross multiply
    8,659.29x = 12,998.16 × 8,345.60
  4. Step 4: Simplify right side
    8,659.29x = 108,477,379.11
  5. Step 5: Solve for x
    x = 108,477,379.11/8,659.29
  6. Step 6: Final answer
    x = 12,527.28

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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.