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Finding the Fourth Proportional to 8,709.48, 11,992.86 and 7,875.90

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Solution

The fourth proportional to 8,709.48, 11,992.86 and 7,875.90 is: 10,845.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.48 : 11,992.86 = 7,875.90 : x
  2. Step 2: Convert to fraction form
    8,709.48/11,992.86 = 7,875.90/x
  3. Step 3: Cross multiply
    8,709.48x = 11,992.86 × 7,875.90
  4. Step 4: Simplify right side
    8,709.48x = 94,454,566.07
  5. Step 5: Solve for x
    x = 94,454,566.07/8,709.48
  6. Step 6: Final answer
    x = 10,845.03

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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.