Home / 12,491.38-18,741.93-11,470.78

Finding the Fourth Proportional to 12,491.38, 18,741.93 and 11,470.78

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Solution

The fourth proportional to 12,491.38, 18,741.93 and 11,470.78 is: 17,210.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.38 : 18,741.93 = 11,470.78 : x
  2. Step 2: Convert to fraction form
    12,491.38/18,741.93 = 11,470.78/x
  3. Step 3: Cross multiply
    12,491.38x = 18,741.93 × 11,470.78
  4. Step 4: Simplify right side
    12,491.38x = 214,984,555.81
  5. Step 5: Solve for x
    x = 214,984,555.81/12,491.38
  6. Step 6: Final answer
    x = 17,210.63

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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.