Home / 5,389.92-8,085.36-3,915.36

Finding the Fourth Proportional to 5,389.92, 8,085.36 and 3,915.36

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Solution

The fourth proportional to 5,389.92, 8,085.36 and 3,915.36 is: 5,873.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,389.92 : 8,085.36 = 3,915.36 : x
  2. Step 2: Convert to fraction form
    5,389.92/8,085.36 = 3,915.36/x
  3. Step 3: Cross multiply
    5,389.92x = 8,085.36 × 3,915.36
  4. Step 4: Simplify right side
    5,389.92x = 31,657,095.13
  5. Step 5: Solve for x
    x = 31,657,095.13/5,389.92
  6. Step 6: Final answer
    x = 5,873.39

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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.