Home / 6,645.32-9,171.86-3,957.20

Finding the Fourth Proportional to 6,645.32, 9,171.86 and 3,957.20

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Solution

The fourth proportional to 6,645.32, 9,171.86 and 3,957.20 is: 5,461.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,645.32 : 9,171.86 = 3,957.20 : x
  2. Step 2: Convert to fraction form
    6,645.32/9,171.86 = 3,957.20/x
  3. Step 3: Cross multiply
    6,645.32x = 9,171.86 × 3,957.20
  4. Step 4: Simplify right side
    6,645.32x = 36,294,818.75
  5. Step 5: Solve for x
    x = 36,294,818.75/6,645.32
  6. Step 6: Final answer
    x = 5,461.72

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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.