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Finding the Fourth Proportional to 5,141.95, 7,712.93 and 1,855.05

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Solution

The fourth proportional to 5,141.95, 7,712.93 and 1,855.05 is: 2,782.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,141.95 : 7,712.93 = 1,855.05 : x
  2. Step 2: Convert to fraction form
    5,141.95/7,712.93 = 1,855.05/x
  3. Step 3: Cross multiply
    5,141.95x = 7,712.93 × 1,855.05
  4. Step 4: Simplify right side
    5,141.95x = 14,307,839.78
  5. Step 5: Solve for x
    x = 14,307,839.78/5,141.95
  6. Step 6: Final answer
    x = 2,782.57

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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.