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Finding the Fourth Proportional to 8,784.86, 13,121.10 and 7,950.65

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Solution

The fourth proportional to 8,784.86, 13,121.10 and 7,950.65 is: 11,875.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,784.86 : 13,121.10 = 7,950.65 : x
  2. Step 2: Convert to fraction form
    8,784.86/13,121.10 = 7,950.65/x
  3. Step 3: Cross multiply
    8,784.86x = 13,121.10 × 7,950.65
  4. Step 4: Simplify right side
    8,784.86x = 104,321,208.11
  5. Step 5: Solve for x
    x = 104,321,208.11/8,784.86
  6. Step 6: Final answer
    x = 11,875.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.