Home / 11,439.40-15,787.40-6,724.38

Finding the Fourth Proportional to 11,439.40, 15,787.40 and 6,724.38

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Solution

The fourth proportional to 11,439.40, 15,787.40 and 6,724.38 is: 9,280.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,439.40 : 15,787.40 = 6,724.38 : x
  2. Step 2: Convert to fraction form
    11,439.40/15,787.40 = 6,724.38/x
  3. Step 3: Cross multiply
    11,439.40x = 15,787.40 × 6,724.38
  4. Step 4: Simplify right side
    11,439.40x = 106,160,476.81
  5. Step 5: Solve for x
    x = 106,160,476.81/11,439.40
  6. Step 6: Final answer
    x = 9,280.25

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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.