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Finding the Fourth Proportional to 15,415.65, 21,274.02 and 9,363.84

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Solution

The fourth proportional to 15,415.65, 21,274.02 and 9,363.84 is: 12,922.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,415.65 : 21,274.02 = 9,363.84 : x
  2. Step 2: Convert to fraction form
    15,415.65/21,274.02 = 9,363.84/x
  3. Step 3: Cross multiply
    15,415.65x = 21,274.02 × 9,363.84
  4. Step 4: Simplify right side
    15,415.65x = 199,206,519.44
  5. Step 5: Solve for x
    x = 199,206,519.44/15,415.65
  6. Step 6: Final answer
    x = 12,922.36

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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.