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Finding the Fourth Proportional to 12,313.58, 18,440.87 and 8,972.87

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Solution

The fourth proportional to 12,313.58, 18,440.87 and 8,972.87 is: 13,437.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,313.58 : 18,440.87 = 8,972.87 : x
  2. Step 2: Convert to fraction form
    12,313.58/18,440.87 = 8,972.87/x
  3. Step 3: Cross multiply
    12,313.58x = 18,440.87 × 8,972.87
  4. Step 4: Simplify right side
    12,313.58x = 165,467,392.13
  5. Step 5: Solve for x
    x = 165,467,392.13/12,313.58
  6. Step 6: Final answer
    x = 13,437.80

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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.