Home / 15,880.30-21,916.15-8,809

Finding the Fourth Proportional to 15,880.30, 21,916.15 and 8,809

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Solution

The fourth proportional to 15,880.30, 21,916.15 and 8,809 is: 12,157.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,880.30 : 21,916.15 = 8,809 : x
  2. Step 2: Convert to fraction form
    15,880.30/21,916.15 = 8,809/x
  3. Step 3: Cross multiply
    15,880.30x = 21,916.15 × 8,809
  4. Step 4: Simplify right side
    15,880.30x = 193,059,365.35
  5. Step 5: Solve for x
    x = 193,059,365.35/15,880.30
  6. Step 6: Final answer
    x = 12,157.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.