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Finding the Fourth Proportional to 7,865.84, 11,798.85 and 2,672.12

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Solution

The fourth proportional to 7,865.84, 11,798.85 and 2,672.12 is: 4,008.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,865.84 : 11,798.85 = 2,672.12 : x
  2. Step 2: Convert to fraction form
    7,865.84/11,798.85 = 2,672.12/x
  3. Step 3: Cross multiply
    7,865.84x = 11,798.85 × 2,672.12
  4. Step 4: Simplify right side
    7,865.84x = 31,527,943.06
  5. Step 5: Solve for x
    x = 31,527,943.06/7,865.84
  6. Step 6: Final answer
    x = 4,008.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.