Home / 12,787.56-19,172.37-4,889.75

Finding the Fourth Proportional to 12,787.56, 19,172.37 and 4,889.75

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Solution

The fourth proportional to 12,787.56, 19,172.37 and 4,889.75 is: 7,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.56 : 19,172.37 = 4,889.75 : x
  2. Step 2: Convert to fraction form
    12,787.56/19,172.37 = 4,889.75/x
  3. Step 3: Cross multiply
    12,787.56x = 19,172.37 × 4,889.75
  4. Step 4: Simplify right side
    12,787.56x = 93,748,096.21
  5. Step 5: Solve for x
    x = 93,748,096.21/12,787.56
  6. Step 6: Final answer
    x = 7,331.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.