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Finding the Fourth Proportional to 12,256.60, 18,384.90 and 3,491.40

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Solution

The fourth proportional to 12,256.60, 18,384.90 and 3,491.40 is: 5,237.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,256.60 : 18,384.90 = 3,491.40 : x
  2. Step 2: Convert to fraction form
    12,256.60/18,384.90 = 3,491.40/x
  3. Step 3: Cross multiply
    12,256.60x = 18,384.90 × 3,491.40
  4. Step 4: Simplify right side
    12,256.60x = 64,189,039.86
  5. Step 5: Solve for x
    x = 64,189,039.86/12,256.60
  6. Step 6: Final answer
    x = 5,237.10

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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.