Home / 5,387.81-8,081.73-1,689.72

Finding the Fourth Proportional to 5,387.81, 8,081.73 and 1,689.72

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Solution

The fourth proportional to 5,387.81, 8,081.73 and 1,689.72 is: 2,534.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,387.81 : 8,081.73 = 1,689.72 : x
  2. Step 2: Convert to fraction form
    5,387.81/8,081.73 = 1,689.72/x
  3. Step 3: Cross multiply
    5,387.81x = 8,081.73 × 1,689.72
  4. Step 4: Simplify right side
    5,387.81x = 13,655,860.82
  5. Step 5: Solve for x
    x = 13,655,860.82/5,387.81
  6. Step 6: Final answer
    x = 2,534.58

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.