Home / 13,432.64-20,144.90-5,639.72

Finding the Fourth Proportional to 13,432.64, 20,144.90 and 5,639.72

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Solution

The fourth proportional to 13,432.64, 20,144.90 and 5,639.72 is: 8,457.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,432.64 : 20,144.90 = 5,639.72 : x
  2. Step 2: Convert to fraction form
    13,432.64/20,144.90 = 5,639.72/x
  3. Step 3: Cross multiply
    13,432.64x = 20,144.90 × 5,639.72
  4. Step 4: Simplify right side
    13,432.64x = 113,611,508.80
  5. Step 5: Solve for x
    x = 113,611,508.80/13,432.64
  6. Step 6: Final answer
    x = 8,457.87

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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.