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Finding the Fourth Proportional to 14,315.65, 19,755.57 and 7,943.21

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Solution

The fourth proportional to 14,315.65, 19,755.57 and 7,943.21 is: 10,961.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,315.65 : 19,755.57 = 7,943.21 : x
  2. Step 2: Convert to fraction form
    14,315.65/19,755.57 = 7,943.21/x
  3. Step 3: Cross multiply
    14,315.65x = 19,755.57 × 7,943.21
  4. Step 4: Simplify right side
    14,315.65x = 156,922,641.18
  5. Step 5: Solve for x
    x = 156,922,641.18/14,315.65
  6. Step 6: Final answer
    x = 10,961.61

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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.