Home / 13,660.86-20,491.20-7,813.32

Finding the Fourth Proportional to 13,660.86, 20,491.20 and 7,813.32

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Solution

The fourth proportional to 13,660.86, 20,491.20 and 7,813.32 is: 11,719.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,660.86 : 20,491.20 = 7,813.32 : x
  2. Step 2: Convert to fraction form
    13,660.86/20,491.20 = 7,813.32/x
  3. Step 3: Cross multiply
    13,660.86x = 20,491.20 × 7,813.32
  4. Step 4: Simplify right side
    13,660.86x = 160,104,302.78
  5. Step 5: Solve for x
    x = 160,104,302.78/13,660.86
  6. Step 6: Final answer
    x = 11,719.93

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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.