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Finding the Fourth Proportional to 8,920.65, 13,322.94 and 8,085.99

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Solution

The fourth proportional to 8,920.65, 13,322.94 and 8,085.99 is: 12,076.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.65 : 13,322.94 = 8,085.99 : x
  2. Step 2: Convert to fraction form
    8,920.65/13,322.94 = 8,085.99/x
  3. Step 3: Cross multiply
    8,920.65x = 13,322.94 × 8,085.99
  4. Step 4: Simplify right side
    8,920.65x = 107,729,159.61
  5. Step 5: Solve for x
    x = 107,729,159.61/8,920.65
  6. Step 6: Final answer
    x = 12,076.38

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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.