Home / 6,639.12-9,165.51-5,143.68

Finding the Fourth Proportional to 6,639.12, 9,165.51 and 5,143.68

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Solution

The fourth proportional to 6,639.12, 9,165.51 and 5,143.68 is: 7,101.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.12 : 9,165.51 = 5,143.68 : x
  2. Step 2: Convert to fraction form
    6,639.12/9,165.51 = 5,143.68/x
  3. Step 3: Cross multiply
    6,639.12x = 9,165.51 × 5,143.68
  4. Step 4: Simplify right side
    6,639.12x = 47,144,450.48
  5. Step 5: Solve for x
    x = 47,144,450.48/6,639.12
  6. Step 6: Final answer
    x = 7,101.01

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Half scale
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Double scale
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Similar ratio
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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.