Home / 13,660.16-20,438.40-8,453.12

Finding the Fourth Proportional to 13,660.16, 20,438.40 and 8,453.12

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Solution

The fourth proportional to 13,660.16, 20,438.40 and 8,453.12 is: 12,647.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,660.16 : 20,438.40 = 8,453.12 : x
  2. Step 2: Convert to fraction form
    13,660.16/20,438.40 = 8,453.12/x
  3. Step 3: Cross multiply
    13,660.16x = 20,438.40 × 8,453.12
  4. Step 4: Simplify right side
    13,660.16x = 172,768,247.81
  5. Step 5: Solve for x
    x = 172,768,247.81/13,660.16
  6. Step 6: Final answer
    x = 12,647.60

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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.