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Finding the Fourth Proportional to 7,171.79, 9,903.60 and 5,400.32

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Solution

The fourth proportional to 7,171.79, 9,903.60 and 5,400.32 is: 7,457.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,171.79 : 9,903.60 = 5,400.32 : x
  2. Step 2: Convert to fraction form
    7,171.79/9,903.60 = 5,400.32/x
  3. Step 3: Cross multiply
    7,171.79x = 9,903.60 × 5,400.32
  4. Step 4: Simplify right side
    7,171.79x = 53,482,559.63
  5. Step 5: Solve for x
    x = 53,482,559.63/7,171.79
  6. Step 6: Final answer
    x = 7,457.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.