Home / 5,418.50-8,127.75-1,314.50

Finding the Fourth Proportional to 5,418.50, 8,127.75 and 1,314.50

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Solution

The fourth proportional to 5,418.50, 8,127.75 and 1,314.50 is: 1,971.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.50 : 8,127.75 = 1,314.50 : x
  2. Step 2: Convert to fraction form
    5,418.50/8,127.75 = 1,314.50/x
  3. Step 3: Cross multiply
    5,418.50x = 8,127.75 × 1,314.50
  4. Step 4: Simplify right side
    5,418.50x = 10,683,927.38
  5. Step 5: Solve for x
    x = 10,683,927.38/5,418.50
  6. Step 6: Final answer
    x = 1,971.75

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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.