Home / 13,639.34-20,455.58-9,679.04

Finding the Fourth Proportional to 13,639.34, 20,455.58 and 9,679.04

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Solution

The fourth proportional to 13,639.34, 20,455.58 and 9,679.04 is: 14,516.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.34 : 20,455.58 = 9,679.04 : x
  2. Step 2: Convert to fraction form
    13,639.34/20,455.58 = 9,679.04/x
  3. Step 3: Cross multiply
    13,639.34x = 20,455.58 × 9,679.04
  4. Step 4: Simplify right side
    13,639.34x = 197,990,452.38
  5. Step 5: Solve for x
    x = 197,990,452.38/13,639.34
  6. Step 6: Final answer
    x = 14,516.14

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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.