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Finding the Fourth Proportional to 12,260.88, 18,387.90 and 4,865.22

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Solution

The fourth proportional to 12,260.88, 18,387.90 and 4,865.22 is: 7,296.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,260.88 : 18,387.90 = 4,865.22 : x
  2. Step 2: Convert to fraction form
    12,260.88/18,387.90 = 4,865.22/x
  3. Step 3: Cross multiply
    12,260.88x = 18,387.90 × 4,865.22
  4. Step 4: Simplify right side
    12,260.88x = 89,461,178.84
  5. Step 5: Solve for x
    x = 89,461,178.84/12,260.88
  6. Step 6: Final answer
    x = 7,296.47

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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.