Home / 12,171.16-16,787.55-7,914.36

Finding the Fourth Proportional to 12,171.16, 16,787.55 and 7,914.36

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Solution

The fourth proportional to 12,171.16, 16,787.55 and 7,914.36 is: 10,916.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,171.16 : 16,787.55 = 7,914.36 : x
  2. Step 2: Convert to fraction form
    12,171.16/16,787.55 = 7,914.36/x
  3. Step 3: Cross multiply
    12,171.16x = 16,787.55 × 7,914.36
  4. Step 4: Simplify right side
    12,171.16x = 132,862,712.42
  5. Step 5: Solve for x
    x = 132,862,712.42/12,171.16
  6. Step 6: Final answer
    x = 10,916.19

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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.