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Finding the Fourth Proportional to 15,880.96, 21,916.71 and 8,807.39

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Solution

The fourth proportional to 15,880.96, 21,916.71 and 8,807.39 is: 12,154.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,880.96 : 21,916.71 = 8,807.39 : x
  2. Step 2: Convert to fraction form
    15,880.96/21,916.71 = 8,807.39/x
  3. Step 3: Cross multiply
    15,880.96x = 21,916.71 × 8,807.39
  4. Step 4: Simplify right side
    15,880.96x = 193,028,957.70
  5. Step 5: Solve for x
    x = 193,028,957.70/15,880.96
  6. Step 6: Final answer
    x = 12,154.74

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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.