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Finding the Fourth Proportional to 11,315, 15,614.72 and 6,279.04

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Solution

The fourth proportional to 11,315, 15,614.72 and 6,279.04 is: 8,665.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,315 : 15,614.72 = 6,279.04 : x
  2. Step 2: Convert to fraction form
    11,315/15,614.72 = 6,279.04/x
  3. Step 3: Cross multiply
    11,315x = 15,614.72 × 6,279.04
  4. Step 4: Simplify right side
    11,315x = 98,045,451.47
  5. Step 5: Solve for x
    x = 98,045,451.47/11,315
  6. Step 6: Final answer
    x = 8,665.09

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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.