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Finding the Fourth Proportional to 5,457.60, 8,153.28 and 5,431.68

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Solution

The fourth proportional to 5,457.60, 8,153.28 and 5,431.68 is: 8,114.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,457.60 : 8,153.28 = 5,431.68 : x
  2. Step 2: Convert to fraction form
    5,457.60/8,153.28 = 5,431.68/x
  3. Step 3: Cross multiply
    5,457.60x = 8,153.28 × 5,431.68
  4. Step 4: Simplify right side
    5,457.60x = 44,286,007.91
  5. Step 5: Solve for x
    x = 44,286,007.91/5,457.60
  6. Step 6: Final answer
    x = 8,114.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.