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Finding the Fourth Proportional to 12,491.79, 18,599.01 and 12,317.43

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Solution

The fourth proportional to 12,491.79, 18,599.01 and 12,317.43 is: 18,339.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.79 : 18,599.01 = 12,317.43 : x
  2. Step 2: Convert to fraction form
    12,491.79/18,599.01 = 12,317.43/x
  3. Step 3: Cross multiply
    12,491.79x = 18,599.01 × 12,317.43
  4. Step 4: Simplify right side
    12,491.79x = 229,092,003.74
  5. Step 5: Solve for x
    x = 229,092,003.74/12,491.79
  6. Step 6: Final answer
    x = 18,339.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.