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Finding the Fourth Proportional to 15,882.16, 21,916.28 and 8,808.88

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Solution

The fourth proportional to 15,882.16, 21,916.28 and 8,808.88 is: 12,155.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,882.16 : 21,916.28 = 8,808.88 : x
  2. Step 2: Convert to fraction form
    15,882.16/21,916.28 = 8,808.88/x
  3. Step 3: Cross multiply
    15,882.16x = 21,916.28 × 8,808.88
  4. Step 4: Simplify right side
    15,882.16x = 193,057,880.57
  5. Step 5: Solve for x
    x = 193,057,880.57/15,882.16
  6. Step 6: Final answer
    x = 12,155.64

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1.5x scale

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.