Home / 5,121.09-7,681.59-1,658.34

Finding the Fourth Proportional to 5,121.09, 7,681.59 and 1,658.34

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Solution

The fourth proportional to 5,121.09, 7,681.59 and 1,658.34 is: 2,487.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.09 : 7,681.59 = 1,658.34 : x
  2. Step 2: Convert to fraction form
    5,121.09/7,681.59 = 1,658.34/x
  3. Step 3: Cross multiply
    5,121.09x = 7,681.59 × 1,658.34
  4. Step 4: Simplify right side
    5,121.09x = 12,738,687.96
  5. Step 5: Solve for x
    x = 12,738,687.96/5,121.09
  6. Step 6: Final answer
    x = 2,487.50

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Double scale
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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.