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Finding the Fourth Proportional to 15,881.46, 21,916.08 and 8,807.73

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Solution

The fourth proportional to 15,881.46, 21,916.08 and 8,807.73 is: 12,154.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,881.46 : 21,916.08 = 8,807.73 : x
  2. Step 2: Convert to fraction form
    15,881.46/21,916.08 = 8,807.73/x
  3. Step 3: Cross multiply
    15,881.46x = 21,916.08 × 8,807.73
  4. Step 4: Simplify right side
    15,881.46x = 193,030,915.30
  5. Step 5: Solve for x
    x = 193,030,915.30/15,881.46
  6. Step 6: Final answer
    x = 12,154.48

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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.