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Finding the Fourth Proportional to 8,709.30, 12,019.72 and 5,125.66

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Solution

The fourth proportional to 8,709.30, 12,019.72 and 5,125.66 is: 7,073.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.30 : 12,019.72 = 5,125.66 : x
  2. Step 2: Convert to fraction form
    8,709.30/12,019.72 = 5,125.66/x
  3. Step 3: Cross multiply
    8,709.30x = 12,019.72 × 5,125.66
  4. Step 4: Simplify right side
    8,709.30x = 61,608,998.02
  5. Step 5: Solve for x
    x = 61,608,998.02/8,709.30
  6. Step 6: Final answer
    x = 7,073.93

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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.